Mercedes k57 relay. All terminals sre tight, both batteries are fairly recent.

Mercedes k57 relay. Apr 17, 2016 · Yes the good old 230 will always start as the K57 relay kicks in all the power coming from the starter battery. It should be around 3 ohms, I think. I can only conclude that they cannot be swapped over. Main battery (genuine Mercedes) 2. See Fig. 1. They’re engineered specifically to function with their fellow parts and systems, and they’re May 15, 2014 · Good afternoon, Attention all Merc techs Smile I've got an sl350 (R230, 272. I can clear it with the button on my steering wheel. 06) · M1 Starter · M4/7 Engine and air conditioning electric suction fan with integrated control · N10/1 Driver-side SAM control unit with fuse and relay module · N10/2 Rear SAM control unit with fuse and relay module · N82 Battery control unit (up to 31. The inverter box is called such because there is no direct connection between the batteries when K57 is Registered trademarks ESP®isaregisteredtrademarkofDaimlerAG. In BCM I have code 9091 - the control of component K57/2 (auxiliary battery relay) does not close or the Mercedes-Benz Club of America Member and automobile and motorcycle mechanic aficionado, Leland Hardy, describes the tasks involved in replacing the car's amb According to Mercedes-Benz, the main battery, usually found in the trunk, supplies the onboard electrical system in regular operation. ? I've seen lots about a K57 relay and BCM that may need to be replaced? What do these components do? And would my car still run if they are kaput? As the car starts, runs and drives fine, what is the problem with me running with the red light warning? What's going to fail? Auxiliary battery relay, location The auxiliary battery relay (K57/2) is located on the partition wall towards the passenger compartment in the vicinity of the auxiliary battery (G1/7). Sep 6, 2018 · 3. Sep 28, 2022 · Replace the K57 relay with a new one from Mercedes and still had the red icon. 06 except CODE (494) USA version except CODE (498) Japan version MODEL Jun 2, 2019 · The K57 relay (one of two in the rhs of the boot area) needs changing. Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The manner in which it controls the relay is indecipherable: Jul 10, 2024 · finally did some checking. Have a e class 220cdi estate 2004 model, the battery symbol light up with visit the work shop, I have changed the small The paper discusses the design and functionality of the R230 Dual Battery On-board Electrical System. 8, then the K57 relay energizes and causes a direct connection to the alternator through fuse F52f1. Actual Mercedes-Benz Sprinter II (W906) (2006-2019) diagrams & schemes (fuse box diagrams & layouts, location diagrams, wiring diagrams etc. Oct 30, 2015 · The feed from the alternator goes to the battery inverter box, and then on to the two batteries as needed. Locate it near the battery compartment or fuse box. The K57 cutoff relay is controlled by the "signal acquisition and actuation module," or "SAM" as Mercedes calls it. The battery control module monitors system voltage. Auxiliary battery relay, task The auxiliary battery relay (K57/2) isolates the battery (G1) from the auxiliary battery (G1/7). Aug 7, 2024 · To clarify I wasn't able to communicate with the module before so obviously a good sign, so far. May 16, 2024 · I have the dreaded red battery warning on my dashboard. Greg Oct 22, 2017 · Filter on “wip”, “wipe” or “wiper” and you’ll be shown all “wiper” hits, with their locations and relay/fuse numbers. 26amp draw. The battery isolating relay K57 controls power distribution between batteries. May Qualify For FREE SHIPPING. Repair Change VehicleBookmarks 1Library RequestConversion CalculatorShare a Repair 4 Nov 28, 2014 · Is there a relay between the ignition switch and the starter relay that I can not find? I see there is a K57 relay but I am not sure that is the problem. When the relay opens, there isn't anything attached to the additional battery (except on the Marco Polo, where it continues to power the pop-top lights). The Battery Cutoff Relay (003-542-28-19) you order from Mercedes-Benz USA will be a genuine OEM part manufactured specifically to fit your 2003-2023 Mercedes-Benz vehicle. The secondary (auxiliary) battery is a short-term backup for the power supply in the event of the onboard system battery failing. 3. Checking fault codes on Star in ESP it is showing code C18D5 check control unit N82 (battery control module). DOT. Dec 9, 2004 · Here is the interesting finding I am trying to find an answer for - WHY is the , even when the car is off? It looks like the relay is constantly energized. Could starting up after replacing the fuel filter cause the check Jun 16, 2024 · I think the BCM does a test of K57 when the ignition is switched on, and code B1828 occurs when the BCM does not detect the correct current flow through K57's coil. Manuals and User Guides for Mercedes-Benz W211 Mercedes E-Class Sedan. 06) · Z7/24 Circuit 87 connector sleeve Jun 2, 2019 · I need to change the K57 relay. Havnt been for reset yet but red message still there. I had placed Mar 11, 2021 · Could someone explain what the removal of the K57 relay accomplishes? Don't remove it; it's there to connect both batteries in case the rear goes too low to power essential equipment such as the ECU and brakes. Here's the part that describes K57 operation by the SAM. Als je het weet, DEEL DAN AUB wat ik moet verwijderen om erbij te komen. I went to have a look today and started removing trim panel fasteners etc, but the deeper I dug, the more it appeared needed to be removed. Upon initial scan, the error was K57 relay. Jan 2, 2015 · Battery Light Well I checked both fuses on the Passenger Side Floor and both are good. Page 18 Auxiliary Battery Relay (K57/2) Auxiliary Battery Relay (K57/2) Location: Below windshield wiper cowl plastic trim Function: • Controlled by N82 • De-energized during normal operation (N. Code: 9090 Fault: Not Relevant! Consumer shutoff, stage 2 Code: 9050 Fault: Component K57/2 (Auxiliary battery relay) or the signal wire to the component is faulty. May 15, 2014 · Continued wiring checks to relay k57 - all wiring good. 84 Add to Cart Jul 30, 2025 · Notes: Multi Purpose Relay (4-Prong) (Black). 5 Mechanic's Assistant: Thank you for providing the details about your 2005 Mercedes SL500. I have changed a few BCM units with no visible damage inside My advice would be to get it on star for a scan first. verify that I get . I noticed two faults that I was able to clear from the BNS module, B1828 - Component 'K57 (Battery isolating relay)' is fault or no terminal 61 - Stored/Current and B1829 - Component 'Fuse for starter battery circuit' is fault - Stored. I am a bit confused now, car seems to be working properly, I am just fed up of seeing this red message. com A forum community dedicated to Mercedes-Benz owners and enthusiasts. This is unfortunately quite common issue across entire Mercedes model range. remove K57 relay as suggested. Symptoms include battery drain or failure to start. I believe it is nearly effortless to eliminate the BCM from a car. $209. Publication details K57/2 Additional battery relay: Shown on 219 CLS 500 Engine compartment, right rear Mercedes Benz Sprinter fuse box diagrams change across years, pick the right year of your vehicle: In this video I am showing the way I am dealing with Auxiliary Battery Malfunction problem. It all started when I replaced my consumer battery. 68. Greg Oct 30, 2018 · I think Mercedes engineers would say that the second battery and K57 relay are not needed because of conventional brakes instead of SBC. Is it just a conventional split charge relay, like you might see in a camper van for instance, such that it only needs to see some alternator output for it to close? Jul 22, 2023 · Also disconnecting the k57 emergency start relay eliminates another potential problem, but the car won't get a extra boost if the starting battery is weak, not a problem if you keep your batteries in good condition. Mercedes Benz Sprinter fuse box diagrams change across years, pick the right year of your vehicle: Mar 11, 2013 · Found it, it's too big to add the PDF document here. If the rear SAM control unit with fuse and relay module (N10/2) detects that the trunk lid is open when the engine is started Jul 3, 2020 · I assume this means the alternator is working OK. Check what voltage you see on F32. It's showing code B1828 in the battery module (component K57 battery isolating relay). 0 /2 up to 31. Changed the bcm and the k57/2 relay. Come join the discussion about performance, classifieds, troubleshooting, maintenance, and more for all Mercedes-Benz and AMG models! Found 3 result (s) for your search Where can i find the k57/2 relay for the aux battery? Mechanic's Assistant chat Customer: Where can I locate the K57/2 relay for the auxiliary battery? Sep 15, 2025 · One New Genuine Battery Overload Relay 0025424719 0025426419 for Mercedes MB Original Equipment found in US vehicles and worldwide Located in Engine Compartment K57/2 Battery control module and cut-out relay Direct fit and function Meets or exceeds OE specification Important Automotive parts have specific fitment requirements, please do not try to make it work. disconnect BCM 30a interface from starter battery cable. I replaced the K57 Relay in trunk. Nov 19, 2016 · In the BCM the only error was 9091 -the contact of component K57/2 ( auxiliary battery relay) does not close or the fuse upstream of the contact is defective. Please use the compatibility Jul 20, 2023 · The alternator and battery control relay were both replaced by my local specialist in 2018 and I fitted new main and auxiliary batteries last year. Jul 14, 2023 · So there is a K57 relay that defeats the purpose of the E36? OK, I found @Gottlieb 's reference attached in full. Locating the K57/2 Relay for Aux Battery Systems Aux battery systems often face relay failures and wiring connection issues causing power interruptions. Now have 2 mini voltmeters, one for each battery, where the dashtop clock used to be. If voltage reaches a low point, the auxiliary battery relay closes to connect the battery to the vehicle fuse blocks. So I would remove K57 and measure the resistance of the coil. To test the K57/2 battery relay and battery control module, start by measuring voltage drop across the relay terminals while the car is off. It will be delivered directly to your home or work. ) may vary depend on the model version. The document includes detailed specifications for battery types and failure displays along with Mercedes-Benz fuse box diagram - layouts and locations. 5. 26 amp draw on front starter battery with all BCM, K57, and consumer battery connected. Have a e class 220cdi estate 2004 model, the battery symbol light up with visit the work shop, I have changed the small May 8, 2009 · Review the dual battery diagram previously posted you will see only the fuse (f30) and auxiliary battery relay (k57/2) stand between the auxiliary battery and battery control module (n82) barring an actual identified break in the internal cable. Things are still pointing towards faulty BNS. I disconnected both batteries correctly and removed the Battery Control Module located in trunk for inspection. 168. 966) with the usual RED battery warning light illuminated on the dash with "visit workshop" displayed. For a detailed description, click on the link provided below. Aug 16, 2025 · Notes: Battery Overload Relay. Alternatively, filter a location and all relays and fuses pop up, with their respective functions. 540. Apparently this faulty relay caused the starter battery code the first time around, unless there were two problems causing that malfunction message! Mercedes-Benz USA, LLC Mercedes-Benz Canada, Inc. Canada only: "Authorized Sprinter Dealer" is defined as an authorized Mercedes-Benz Sprinter Dealer. Code: 9071 Fault: The contact of component K57/2 (Auxiliary battery relay) does not close or the Nov 4, 2016 · ¿Alguien puede decirme la ubicación exacta del relé de la batería auxiliar K57/2 en mi SL55 de 2008? Me da un poco de miedo desmontar el coche. Check the fuse supplying the relay circuit first, usually located in the main fuse box. Are there any fuses/relays with checking? K57 relay? Thanks in advance! New Bosch alternator new Bosch K57 relay and both fusses in passenger foot well are good. Auxiliary battery relay, location The auxiliary battery relay (K57/2) is located on the partition wall towards the passenger compartment in the vicinity of the auxiliary battery (G1/7). 475) V8-5. Check engine light is now on. All yo Step by step guide on how to fix a common problem with the K40 Relay unit in a R170 series Mercedes Benz SLK 230. Supposedly they kept SBC to the end of the R230 run because redesigning it like the E-Class would have been too expensive. Aug 28, 2025 · Find many great new & used options and get the best deals for 2003-2004 Mercedes Benz SL500 SL600 SL55 AMG Electrical Wiring Diagram Manual at the best online prices at eBay! Free shipping for many products! Genuine Mercedes Relay Module InStock Ships Today! $118. 06 MODEL 211. Nov 29, 2002 · Battery control module detects insufficient voltage at auxiliary battery Auxiliary battery relay (K57/2) is activated for a short period of time if primary system voltage is above 13. But they apparently did have a design that integrated with the rest of the systems. nl 973 subscribers Subscribe Oct 19, 2018 · nope, aux battery is isolated from main circuit via isolation relay, and relay is closed (battery charged) only if system detects low voltage right after engine start. 03. I drained the battery over the winter sitting in my garage Apr 4, 2023 · Still getting intermittent red battery visit workshop convenience disabled. Photo examples of location. I think it's highly unlikely, but perhaps the battery is fully charged and yet the BCM is reading a much lower value. . Fuse box diagram (fuse layout), location, and assignment of fuses and relays Mercedes-Benz Sprinter (W906) (2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Mercedes-Benz Sprinter: Second Generation Slight upgrades that make them quite beneficial. jog). Protects Protects vehicle vehicle electrical electrical systems systems from from voltage voltage surges surges 4. The car runs fine. Thanks GF54. If one battery is bad or not charged, then the relay energizes and stays closed (and will be warm). 30 CAN-B insufficient voltage at auxiliary battery Sep 1, 2015 · Buy Mercedes Multi Purpose Relay Hella OEM 0025422619: Relay Control Module - Amazon. This is on RHD however as I am in the UK. Seems leaving car unlocked doesn't trigger the Battery Feb 24, 2023 · The trunk battery is generally charged through the battery control module, but if the engine is started with that battery having a voltage below 10. Oct 16, 2022 · That's a useful diagram, thank you. com FREE DELIVERY possible on eligible purchases · K57/2 Additional battery relay (up to 31. (I bought from an online auction site as on non runner) Done quite a bit of research which has lead me to th K57 relay in OSR boot area according to WIS. The idea is that remove these from the BCM connect them together with an M8 bolt and also connect to one end of a 30A fuse the other end of which goes to the BCM terminal 30. 5L v6 e350 benz 2006 Jul 4, 2020 · Mercedes-Benz SL500 2003 - 2003-07 MERCEDES-BENZ SL500, SL550, SL55 AMG, SL600 & SL65 AMG Mercedes-Benz SL500 2003 - BUZZERS, RELAYS & TIMERS Mercedes-Benz SL500 2003 BUZZERS, RELAYS & TIMERS LOCATION Component Location Air Pump (Or) Reserve Relay (N) In passenger-side fuse & relay module. 12 Month Warranty. Fuse box diagram (location and assignment of electrical fuses and relays) for Smart Fortwo (W451; 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015). An application with all R230 electrical schematics should soon be available as a free download. The K75 will have current passing through the contacts all the time. What I just noticed is after I stop shut vehicle off no matter the amount of driving I do. Aux battery ( genuine mercedes) Subscribed 365 184K views 7 years ago Mercedes Benz fuse box starter relay location starting problem Starter Motor relaymore The document number is a 230 584 00 96. Remove wiper blade arms2. report provides a detailed list of fuse box diagrams, relay information and fuse box location information for the 2017 Mercedes-Benz GLS550 4matic. Parts# 210 540 03 72 210-540-03-72 210. Mercedes auxiliary battery relay is typically mounted at the top of the firewall, right below the windshield wiper motor. Controls Controls battery battery cut-off cut-off relay relay (K57) (K57) i in WIS 3. Front is exide and rear is varta agm, both batteries are 12. Tried 2 alternators, 1 new and 1 used. Click on an image to find detailed resources for that fuse box or watch any embedded videos for location information and diagrams for the fuse boxes of your vehicle. A high drop indicates a stuck relay causing drain. Wenn Sie es wissen, TEILEN Sie BITTE mit, was ich entfernen muss, um es zu erreichen. If you search the forum for "K57" I think you may find that many members replaced the relay but the code remained. The code B1828 indicates that the battery is not accepting a charge; there may also be an issue with the alternator. Feb 15, 2021 · Hello, I am frustrated with my red service battery light that comes on the dash every time I start the car. Having scanned the vehicle with STAR the only related code is on the cluster (an event, NOT an error) is "fault in AutoHex (Auto Diagnostic scanner) is one of the best Professional scan tools to for Mercedes Benz; Autohex Scanner can test Mercedes Benz Systems effectively and easily, with many powerful features to help you in diagnosing and testing. ? I've seen lots about a K57 relay and BCM that may need to be replaced? What do these components do? And would my car still run if they are kaput? As the car starts, runs and drives fine, what is the problem with me running with the red light warning? What's going to fail? Oct 21, 2020 · Relay gets feed from main battery G1 via pre-fuse box F32. The B1828 code indicates a fault with the K57 isolating relay, which manages battery charging between two batteries. Genuine Mercedes-Benz Parts fit your vehicle like no others can. It's a midi fuse holder. K57 is also double pole btw. The car displays a red battery message that has been consistently appearing and disappearing. Also if I were to change the battery would the roof work? The relay is K57 in the picture. We have 1 Mercedes-Benz W211 Mercedes E-Class Sedan manual available for free PDF download: Manual Sprinter MY2019 – Supplemental Installation Instructions Auxiliary Battery in Engine Compartment (E2M) with Code (E36) Technical Bulletin 907 CSP 11/10/2019 Mercedes-Benz Vans, LLC Nov 4, 2016 · Kann mir bitte jemand die genaue Position des Zusatzbatterie-Relais K57/2 in meinem 2008er SL55 nennen? Ich habe Bedenken, das Auto auseinanderzunehmen. Even if batteries and charging systems test good, a failing K57 relay can trigger the battery warning light. Condition: New. It ensures that the vehicle starts even with a dead systems battery, outlining key components including the starter and systems batteries, power distribution, and available modes of operation. The trims indicate the location of the battery. Ok - assuming the battery is definately ok I would test the lines to the relay from the BCM for continuity - I have known wiring issues under the aux where the wiring rubs through & shorts out on E class - have never known on a CLS to be honest but it is the same setup. About 5 units showed up errors, the one that caught attention was an auxiliary battery code, k57/2 auxiliary battery relay. I stripped out all the trims to gain access to the said Oct 5, 2016 · I am having problems with SBC hold and stop functions intermittently not working. AIR Relay Module (K17) Right rear of engine compartment. I've replaced the relay, and both batteries are charging. Mar 8, 2021 · The Driver side SAM and BNS also failed to communicate on STAR I did see some errors on the ICM against the BNS (Code B1132) where it referenced a CAN communication failure (ICMfaults. 963) (2004) > Mercedes Benz Workshop Service and Repair Manuals > Relays and Modules | Relays and Modules - Power and Ground Distribution | Power Distribution Relay | Component Information | Locations | Page 1150 Jul 11, 2017 · I just replaced the aux battery and filters and oil. Jan 13, 2019 · Its either: F52f1 F52f2 F32 F33 K57 Relay K75 Relay or finally N82/1 module You need to have star diagnostics with you to go through each component to test. Jan 26, 2007 · Were is the relay box because I can pop the roof up but it wont go down. 4. 5V. Can anyone help please and tell me what to do next to switch this message off. How to replace the AUX Battery Relay A0025424719 on a Mercedes W219 CLS-class (CLS55 AMG) DIY POV ND-Photo. The 9071 code says "Component K57/2 (auxiliary battery relay) or the signal wire to the component is faulty" Jul 11, 2017 · I just replaced the aux battery and filters and oil. The car will still start even if you take the rear battery out. If your roof is stopping at some point in its sequence, this is probably a problem with a limit switch and not the battery. So I wonder what conditions have to be met for relay K57 to close. These are both heavy duty relays. 72 2105400372 A2105400372. One would simply energize the K57 relay which would put the starter and systems battery electrically in Nov 28, 2002 · Emergency Mode Summary N82/1 activates cut-off relay (K57) and isolation relay (K75) Starter battery (G1/4) supplies power to systems circuit N82/1 sends emergency operation message via CAN B N82/1 stores DTC‘s Feb 23, 2015 · Thinking still on this the K57 just brings the starter battery into the circuit to be charged, it is just a single pole relay. 10-P-4201T Auxiliary battery relay, location/task 26. Can you tell me if there are any other symptoms or issues you've noticed besides the red battery light on the dash? Nov 12, 2024 · A Mercedes-Benz auxiliary battery malfunction refers to an issue with the secondary battery system in the vehicle. Jul 30, 2025 · Item description from the seller Product Information Genuine 35BD93N Battery Overload Relay Fits 2003-2006 Mercedes E500 *** Must Read Fit Information Below *** Brand: Genuine Battery Overload Relay Notes: Battery Overload Relay -- Located in Engine Compartment, Battery control module and cut-out relay, K57/2 Feb 15, 2019 · 211-auxiliary-battery-relay-location PDF A document that provides information about the location and function of the auxiliary battery relay in a specific vehicle model. ) • Energized to recharge G1/7 • Energized if engine running and system voltage low • Feb 27, 2022 · The batteries are tied through the K57 battery cutoff relay. All terminals sre tight, both batteries are fairly recent. 5V Auxiliary battery is charged by alternator through auxiliary battery relay (K57/2) This charging cycle will only occur once per ignition cycle A DTC indicating the auxiliary battery relay (component K57/2) contact not closing or a blown upstream fuse causes slow battery drain. : vehicle's overall status. Not to be reprinted, translated, or otherwise reproduced, in whole or in part, without writ-ten permission. Probably removing later this week to work on different replacement. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table. 5V Auxiliary battery is charged by alternator through auxiliary battery relay (K57/2) This charging cycle will only occur once per ignition cycle Designation of fuses and relays Mercedes Atego 2004 - 2018 with a box diagram, photo example and location. Check for corrosion, loose terminals, or blown fuses affecting relay operation. Please check the relay K57 located in the rear trunk next to the battery. Nov 4, 2016 · Can someone please tell me the exact location of the Auxiliary Battery Relay K57/2 on my 2008 SL55? I have about taking the car apart. I can connect the k57 relay but would need to extend the wiring. Im using a MBII Icarsoft obd scanner , it says "The contact component k57/2 (auxiliary battery relay) does not close or fuse upstream of the contact is defective" its a 3. This relay is just to the right of the auxiliary battery under the plastic trim where the passenger side wipers are hinged, 2 heavy wires are screwed to it with 2 small wires. I have a 2005 SL500 that won't crank over. Mercedes Mechanic: BrennanB319 This is the K57 relay, also known as the battery isolating relay or battery disconnect relay. I replaced the relay with no success. The battery control unit (N82) actuates the cutoff relay for interruptible loads (K75) for the shut off of the consumer directly, the additional battery relay is actuated for connecting the additional battery (Gl/7)K57/2. Could starting up after replacing the fuel filter cause the check Aug 12, 2014 · Code pointed to K57 battery relay. If necessary and to charge the K57/2 G2 M1 to electrical consumers F30 Polyswitch fuse G1 Battery K57/2 Auxiliary battery relay F32 Front pre-fuse box G1/7 Auxiliary battery M1 Starter F33 Rear pre-fuse box G2 Alternator N82 Battery control module 23 f Auxiliary Battery Charging Mode F33 - Battery control module detects Kl. Protects Protects vehicle vehicle electrical electrical systems systems from from short short circuits circuits 5. The relay K57/2 is not energised until the engine is running so the small battery cannot supply the starter. Documentation team ©Mercedes-Benz AG: not to be reprinted, transla-ted or otherwise reproduced, in whole or in part, without written permission from Mercedes-Benz AG. The K57/2 relay controls auxiliary battery power flow. Ich habe Google durchsucht, bis ich blau war. 2. May 8, 2024 · I had mentioned looking at live data to see what the BCM thinks the voltage is of the systems battery. I'll need to physically check the BNS and SAM modules next. E300. Jan 13, 2017 · Hi, The coil supply for the Auxiliary Battery Relay (Mercedes refer to it as K57/2), one side comes from the Battery Control Module (refered to as N82) and the other side of the coil is fed from the Auxiliary Battery (refered to as G1/7), this cable also has a splice going to the Battery Control Module (N82) via. This aux battery is responsible for powering various electrical systems in the vehicle but, most critically, allowing the electronically controlled transmission to shift in Park if the main battery power is cut. Replace with new relay yesterday from Merc. Mercedes-Benz USA, LLC and Mercedes-Benz Canada Inc. Battery Cut-off Relay, Location/Task/Design/FunctionLocation The battery cutoff relay (K57) is located on the floor of the trunk towards the partition wall next to the vehicle power supply control module (N82/1). If there isn't an access door to the relay, you will need to remove the trims to reach it, as shown in the picture I shared. Nov 28, 2002 · 2. Fuse boxes change across years, pick the year of your vehicle: May 9, 2005 · Hi all can anyone please tell me where exact location of auxiliary battery relay and the battery control module is and how to check these please, as I am getting red battery warning. **** Yes, this connector block looks good. rem Jun 14, 2025 · Find many great new & used options and get the best deals for Battery Overload Relay For 03-09 Mercedes E320 E350 E500 E55 AMG E550 E63 VH51P1 at the best online prices at eBay! Free shipping for many products! Aug 17, 2019 · If batteries are fine inclusive of load test before replacing any additional parts consider disassembling front pre-fuse box to check k57/2 relay 150A fuse 70 (211 instructions attached same for 219). There's a Customer: Hey, I'm currently working on a 2004 SL600. Do you have any suggestions? SL 500 (230. I then checked charging rate at battery g1/4 and g1 in case constantly stuck in 'prioritisation mode' - all okay, alternator only charging g1 (I think this gives 'consumers offline' message though so didnt expect a problem here). Does this apply? Have the Mercedes Auxiliary Battery Malfunction Fault? If so, you need to watch this video now! We will describe everything you need to fix this fault. When I lock the doors and restart I get the dang Red Battery Symbol. Can anyone provide a readable schematic of the starting system that shows all components? Thanks for any help. are Daimler companies. Click to expand Oct 23, 2023 · I sent power to my good BCM so I don't receive any errors. Dealership offers option to Aug 24, 2015 · Systems: BCM - Battery control module (MB: 2115406945) Fault: The contact of component K57/2 (Auxiliary battery relay) does not open. K75 is NC, which is less common, at least on Mercedes cars anyway. The document offers technical details on the operation of the auxiliary battery relay, explaining its role in managing battery May 5, 2020 · In this guide, you will find instructions on how to replace the auxiliary battery relay (K57/2) on Mercedes-Benz vehicles. All Mercedes-Benz Sprinter II (W906) info & diagrams provided on this site are provided for general information purpose only. The document offers technical details on the operation of the auxiliary battery relay, explaining its role in managing battery Oct 11, 2023 · I think Mercedes engineers would say that the second battery and K57 relay are not needed because of conventional brakes instead of SBC. Mercedes-Benz Forum Jul 3, 2020 · I assume this means the alternator is working OK. Oct 2, 2017 · 211-auxiliary-battery-relay-location PDF A document that provides information about the location and function of the auxiliary battery relay in a specific vehicle model. Cigarette lighter fuse. 71K subscribers Subscribe Aug 23, 2016 · After many failures Mercedes and Bosch allowed the unit to be reprogrammed once to extend its working life rather than replaced. Edit: And one condition of charging is that main voltage (or voltage that BCM N82 sees) should be over 13. Which is located under a plastic cover under your wiper blade arm. Discontinued Fuse & Relay Box 166-540-51-02 Mercedes-Benz Description: Engine compartment, 7 spd trans. If necessary and to charge the Nov 29, 2002 · Battery control module detects insufficient voltage at auxiliary battery Auxiliary battery relay (K57/2) is activated for a short period of time if primary system voltage is above 13. Alex you are not right on this one, no way can I see K75 as a double pole, its only switching a single feed. AIR Relay Module (K17) Right side of trunk. Call (310)626-8765. If you know, PLEASE See full list on youcanic. 6v sat with no load Jul 29, 2024 · Mercedes Sprinter Van: Fuse Guide Last updated Jul 29, 2024 Save as PDF Table of contents Symbols Fuses and Relays Relays in the Co-Driver Footwell Fuses in the Driver's seat base Relay Holder K100 Feb 20, 2007 · After returning the car to the workshop the test gave the following error code: B1828, which points to a faulty battery isolator relay (K57). 5L v6 e350 benz 2006 Jun 15, 2020 · Jun 15, 2020 Messages 12 Reaction score 2 Your Mercedes sl55 amg 2002/2003 Jun 15, 2020 #1 Hoping for a bit of luck may be a long shot but maybe someone has had the same problems will attach pictures Getting the k57 battery isolation relay fault Any ideas on where to start and what to do next, both battery seems to be ok heard alternator could Feb 23, 2015 · K57 is NO, as are most relays. in the past 3 months I have changed 1. On my car, both batteries are new and May 7, 2025 · The rear battery positive Terminal 30 of relay K57 The alternator output, via a 200 amp fuse in the passenger footwell, and to fuse F32 in the front prefuse box. what MB call a Polyfuse (referred to as F30) the function of the Polyfuse is to Mercedes SL500 Battery Isolating Relay K57 Issue Explained SL500 owners often face battery drain and starting problems linked to relay or electrical faults. Mercedes will never admit to a problem UNTIL enough people die when their house burns down. The different variations are equipped with This model is among those vans, which offer a four-wheel-drive that makes it quiteĪdventurous and also apt for business purposes. 5V Auxiliary battery is charged by alternator through auxiliary battery relay (K57/2) This charging cycle will only occur once per ignition cycle 2003 MERCEDES W211 Electrical Problems!! Battery Control Module (BCM) Easy FIX!! ALEX Garage 5. Optimizes charging of auxiliary battery (G1/7) 6. Ik heb Google gezocht tot ik blauw zag. The small battery is called up when needed by the K57 relay, sure they are in parallel during this time, but this is a very short time. Per the documentation, this happens only when the charging system is in 'emergency' or 'limp' mode. It seems as though the dealer by passed f30 and k57/2 by using an external cable. Both areas are separated from one another by the battery cutoff relay (K57) which is switched by the vehicle power supply control module (N82/1) according to requirements. check starter battery connection and find . Battery control module detects insufficient voltage at auxiliary battery Auxiliary battery relay (K57/2) is activated for a short period of time if primary system voltage is above 13. SL Fuse Chart, Location, Diagram, Allocation 2002-2012 R230 SL350 SL500 SL55 AMG SL600 SL65 AMG SL550 SL55 AMG Nov 13, 2016 · Hi all fairly new to this forum. 0L (113. A video on how to replace you're on Auxiliary battery relay. Jul 4, 2020 · Mercedes-Benz E350 2007 - 2007 MERCEDES-BENZ E320, E350, E550 & E63 Mercedes-Benz E350 2007 - BUZZERS, RELAYS & TIMERS Mercedes-Benz E350 2007 BUZZERS, RELAYS & TIMERS LOCATION Component Location AIRmatic Relay Left rear of engine compartment. 5. Jul 4, 2020 · Mercedes-Benz E350 4Matic 2010 - 2010 MERCEDES-BENZ E350, E550 & E63 AMG Mercedes-Benz E350 4Matic 2010 - BUZZERS, RELAYS & TIMERS Mercedes-Benz E350 4Matic 2010 BUZZERS, RELAYS & TIMERS LOCATION Component Location AIRmatic Relay Left rear of engine compartment. How do I move the bootlid out of the way into service mode? At the moment I can’t remove the panel to gain access to the Mercedes Benz Sprinter fuse box and relays diagrams Explore interactive fuse box and relay diagrams for the Mercedes Benz Sprinter. Leon Davidian, Sr. Oct 3, 2006 · Also disconnecting the k57 emergency start relay eliminates another potential problem, but the car won't get a extra boost if the starting battery is weak, not a problem if you keep your batteries in good condition. O. The Mercedes auxiliary battery relay is typically mounted at the top of the firewall, right below the windshield wiper motor. both batteries are charging as they should at 14. The K57/2 in the S211 is the equivalent to the K57 in the R230. It includes a visual diagram showing the relay's precise placement in relation to the vehicle. I erased the codes with SDS, and can drive and drive. Nov 4, 2016 · Kan iemand mij alstublieft de exacte locatie vertellen van het hulpaccurelais K57/2 op mijn 2008 SL55? Ik ben een beetje bang om de auto uit elkaar te halen. Unfortunately this opened the door to many second hand "reprogrammed" units with limited hours left--- to be sold as good secondhand operational units. Ġ5 13 Mercedes S Class W221 C216 Fuse Box Diagram from Burglar alarm relay, smart key control module, e/r fuse & relay box (r4), transaxle range switch. clsp bdjte jrklv jkkc rxsynr jnihipcv rmyde mofula mxcc kjci