2020 MERCEDES BENZ SPRINTER 2500 Electrical System Problems

On November 28, 2025, I experienced a vehicle fire in my Mercedes 2020 Sprinter 2500 4WD van. The van engine was on and idling while heating up with the van heater blower on level 6 (out of 7). After about 45 minutes, I saw a haze first and then smelled smoke. Unsure of the source, I turned the vehicle off and exited with my dog. I opened the hood to look for smoke in the engine bay. No smoke under the hood. I contact Mercedes Roadside and open the driver side door where I see flames under the seat. I grabbed the fire extinguisher I installed and put the fire out within 20-25 seconds of seeing it. I believe the root cause of the fire was running the van blower at a high setting for a sustained 45 minutes. My dog and I were inside and definitely in danger. It scares me to think of a scenario where the van was idling with only my dog inside and something like this occurring. The incident is currently under investigation with MB USA and my insurance company, Progressive. No warning signs or dashboard messages. In general, the electrical wiring for my vehicle has been spotty and was completely rewired by the dealer service center in 2021. Currently, there is an issue blacking out the dashboard screen so there is no screen function including gps, entertainment, or vehicle info.

The contact owns a 2020 Mercedes-Benz Sprinter 2500. The contact stated that while in reverse, the rearview camera failed to display a rearview image. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to provide a cause for the failure. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V411000 (Electrical System, Back Over Prevention); but the VIN was not included in the recall. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 51,000.

Mileage: 51,000

Since date of purchase, May 2022, the electrical components have not worked properly. The solar panels have never worked, the second alternator used to only charge while driving intermittently now it doesn't work at all, and plugging into shore power sometimes melts the cord. The chassis battery frequently drains requiring constant starting or a jump. It has been replaced four times. The cabin lights continue to flicker when turned on. I sought help from the dealer just weeks after purchasing the van. Due to parts and labor shortages, it wouldn't be for 5 months that they could work on the vehicle. Which they did on and off for five months before sending me from Oregon to Alabama to have the manufacturer work on it. They sent me 2300 miles to fix a brand new vehicle that they sold me. After having been to over 15 Mercedes dealers, towed to many, and to the Tiffin manufacturer (and when it turned out not to be fixed. I took it right back but then when it still wasn't fixed. I sought help from Mercedes.), the van is still not fixed and I am often without power.

It is very difficult to start the engine, and when it starts the RPM never goes above 750. I had the van towed to a Specialist and diagnosed. Their diagnosis is that the Engine wiring harness is damaged and causing electrical malfunction which causes a number of saftey systems to prevent the vehicle from operating properly. Mercedes Benz customer service representative indicated that the diagnosis has to be done by one of their dealers and they would decide then if they want to assist. Unfortunately, the local dealer has twice failed to address an issue thatcshould have been addressed under warranty and so I have list confidence in their ability or willingness to assist. I have received an estimate of nearly $6,400.00 to replace the faulty wiring harness on a vehicle with less than 11,000 miles.

The wiring harness under my front passenger swivel seat became pinched and severed the wires. The air bag warning light came on. I took the vehicle to the dealer and got it fixed at my own expense. I noticed the recall #21V410000 which is for the same thing, however my van was not included. Can my van be included so I can be reimbursed by the mfg? Thanks, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Mercedes has a design and installation flaw for the EIS Connector. Its location under the wheel by the metal wall allows for condensation to directly be absorbed into the connector causing corrosion. Once corrosion happens, the van becomes inoperable as the driver cannot shift gears and the van must be towed to the nearest Mercedes dealership. This happens often to vans built after 2019 due to a change in design. Corrosion will happen over time after a change in temperature with condensation build up on the windshield. Mercedes has a solution for this, a boot cover over the EIS, however, it is not widely shared over a safety recall causing Sprinter owners to have an inoperable vehicle when such corrosion happens. This issue can be prevented with a safety recall by installing the cover allowing for a safe and reliable vehicle for civilians on the road.

Mercedes has a design and installation flaw for the EIS Connector. Its location under the wheel by the metal wall allows for condensation to directly be absorbed into the connector causing corrosion. Once corrosion happens, the van becomes inoperable as the driver cannot shift gears and the van must be towed to the nearest Mercedes dealership. This happens often to vans built after 2019 due to a change in design. Corrosion will happen over time after a change in temperature with condensation build up on the windshield. Mercedes has a solution for this, a boot cover over the EIS, however, it is not widely shared over a safety recall causing Sprinter owners to have an inoperable vehicle when such corrosion happens. This issue can be prevented with a safety recall by installing the cover allowing for a safe and reliable vehicle for civilians on the road.

The contact owns a 2020 Mercedes-Benz Sprinter 2500. The contact stated while driving approximately 35 MPH, the instrument cluster lost functionality and the screen went blank. The contact stated no warning was illuminated. The contact had not taken the vehicle to a local dealer or independent mechanic. The vehicle had not been diagnosed or repaired. Additionally, the contact stated that the vehicle had experienced cold start failures. The contact stated that occasionally several attempts were needed to start the vehicle. The contact stated that the failures were intermittent. The manufacturer had been informed of the failure. The contact researched online and related the instrument cluster failure to NHTSA Campaign Number: 23V204000 (Electrical System). The failure mileage was approximately 11,000.

Mileage: 11,000

The rear camera has gone out on numerous occasions. When I place the vehicle in reverse, my infotainment displays a black area with a camera with a line through it, indicating the rear camera is not working. I’m not sure if it’s the same issue as issue “21V411” that affected other 19-21 Mercedes Sprinter vans but it seems like it from what was described.

The 2019+ Mercedes Sprinter EIS (Electronic Ignition System) module is bolted under the driver side dash board to the base of the A pillar where it meets with the firewall. The electrical connector of the module is pointing straight up - this is an issue because any liquids that might spill on the dash (dash cupholder) or any humidity from windshield interior condensation will drip right down the wiring and into the EIS module causing it to short out. _ If the EIS module shorts out, the vehicle will be inoperable until a new unit is fitted. _ The EIS module retails at $1800+ from Mercedes _ Had Mercedes installed the EIS module with the connector facing DOWNWARD - this moisture related issue would not exist. _ There is no drip loop provisions in the wiring. _ Mercedes is aware of the issue as they have created a plastic bag with part number A 638 546 00 35 and they are charging $20 for it. As of right now, Mercedes refuses to fix this issue preventatively. They will only repair it AFTER the EIS module has shorted out. They are refusing to treat this as a warranty claim even though it is clearly a manufacturer defect. Please help? Thank you

The contact owns a 2020 Mercedes-Benz Sprinter 2500. The contact stated that after inclement weather, the cruise control, Forward Collision Avoidance, and Automatic Emergency braking feature failed to operate as needed. The contact restarted the vehicle however, the vehicle would intermittently return to normal operation. The contact had taken the vehicle to various different dealers where the camera, unknown sensors, and other unknown parts were replaced; however, the failure persisted. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 10,000.

Mileage: 10,000

The contact owns a 2020 Mercedes-Benz Sprinter 2500. The contact received notification of NHTSA Campaign Number: 21V411000 (Electrical System, Back Over Prevention) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

The 2019+ Mercedes Sprinter EIS (Electronic Ignition System) module is bolted under the driver side dash board to the base of the A pillar where it meets with the firewall. The electrical connector of the module is pointing straight up - this is an issue because any liquids that might spill on the dash (dash cupholder) or any humidity from windshield interior condensation will drip right down the wiring and into the EIS module causing it to short out. _ If the EIS module shorts out, the vehicle will be inoperable until a new unit is fitted. _ The EIS module retails at $1800+ from Mercedes _ Had Mercedes installed the EIS module with the connector facing DOWNWARD - this moisture related issue would not exist. _ There is no drip loop provisions in the wiring. _ Mercedes is aware of the issue as they have created a plastic bag with part number A 638 546 00 35 and they are charging $20 for it. As of right now, Mercedes refuses to fix this issue preventatively. They will only repair it AFTER the EIS module has shorted out. They are refusing to treat this as a warranty claim even though it is clearly a manufacturer defect.

The 2020 Mercedes Sprinter EIS (Electronic Ignition System) module is placed directly to the base of A pillar. Its electrical connector is pointing straight up and cable entry does not have drop loop - this is an issue because any liquids that might spill on the dash (dash cupholder) or any humidity from windshield interior condensation will drip right down the wiring and into the EIS module causing it to short out. If the EIS module shorts out, the vehicle is inoperable and has to be towed to dealership for repair. MB retails EIS module at $1800+ MB knows it’s a product defect. In its service bulletin of LI54.21-N-069524, They had a temporary solution by using an plastic bag (part number A 638 546 00 35) to cover the top connector. As of right now, Mercedes refuses to fix this issue preventatively. They will only repair it AFTER the EIS module has shorted out. They are refusing to treat this as a warranty claim even though it is clearly a manufacturer defect. Please help? Thank you

Here's what I wrote: The 2019+ Mercedes Sprinter EIS (Electronic Ignition System) module is bolted under the driver side dash board to the base of the A pillar where it meets with the firewall. The electrical connector of the module is pointing straight up - this is an issue because any liquids that might spill on the dash (dash cupholder) or any humidity from windshield interior condensation will drip right down the wiring and into the EIS module causing it to short out. _ If the EIS module shorts out, the vehicle will be inoperable until a new unit is fitted. _ The EIS module retails at $1800+ from Mercedes _ Had Mercedes installed the EIS module with the connector facing DOWNWARD - this moisture related issue would not exist. _ There is no drip loop provisions in the wiring. _ Mercedes is aware of the issue as they have created a plastic bag with part number A 638 546 00 35 and they are charging $20 for it. As of right now, Mercedes refuses to fix this issue preventatively. They will only repair it AFTER the EIS module has shorted out. They are refusing to treat this as a warranty claim even though it is clearly a manufacturer defect. Please help? Thank you

On Sept 6 2021 the engine suddenly stalled/stopped while driving on 194 west of Pullman Wa. A partial restart enabled me to move to a safer location. The Check Engine light came on. I used myOBD scanner to identify engine failure fault codes. Electrical sensor short circuits were identified. Vehicle was transported to a MB dealer in Spokane where a chaffed engine wiring harness was identified as the cause. MB engineers in Stuttgart Germany confirmed this diagnosis. I have now learned that the factory harness installation rubbing against engine components has been an ongoing problem in the Sprinter Van. This defect has contributed to engine failures as acknowledged by several MB technicians. Owners of all affected MB Sprinter Vans should receive notice of this potentially dangerous wiring harness defect. MB USA should be mandated to recall and modify the harness attachment points where abrasion of the harness cover and wiring is occurring. Preventing unexpected engine shutdowns in Highway traffic must be a priority of any vehicle manufacturer. Rear end collisions endanger the safety and lives of vehicle occupants. The defective engine wiring harness installation should be addressed immediately. Please share my report with MB USA. Accident Prevention Saves Lives

My husband was stopped at a stop light on Sept. 9th when the van randomly (and without provocation) shifted itself from drive into park. We called the dealership to explain the problem and ask that they look into it. We made an appointment and dropped off the vehicle yesterday. Service Department called and verbally stated that they had taken a van on a test drive and that the van had acted "normally" and that they anticipated returning the van to us with the instruction that if we experienced the problem again to contact them. I was not happy with this response as I felt that the problem was a severe safety issue and not enough had been done to investigate it. I quickly googled "mercedes going into park on its own" and found an article detailing reports of 2010 mercedes sedans going into park on their own while the driver was slowing to stop (exactly as we experienced). An accompanying official mercedes benz service department memo in the article confirmed the problem, mentioned the "auto p" feature and blamed the problem on a faulty ignition switch. I called the service department back, referenced the memo and asked if a faulty ignition switch could be to blame. The service department stated that it would be impossible because the ignition switch has changed. They stated that my husband must have taken off his seat belt and engaged the auto p feature. My husband did not unbuckle his seat belt that day. The dealership returned the van noting that they were able to duplicate the issue and engage the auto p feature by unbuckling the driver's seat belt at low speed. My husband and I tried to duplicate and engage the auto p feature ourselves by unbuckling the driver's seat belt after it was returned but were unable to do so. Interestingly, mercedes benz has recently issued a recall for driver's manuals because they acknowledge that the directions for how to engage the feature as explained in the manual are incorrect. Unbuckling will not engage auto p.

The contact owns a 2020 Mercedes-Benz Sprinter 2500. The contact received notifications of NHTSA campaign numbers: 20V802000 (Service Brakes, Hydraulic), 21V055000 (Electrical System), and 21V411000 (Electrical System, Back Over Prevention) however, the dealer informed the contact that the parts for the recall repairs were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was not notified of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

BOUGHT VEHICLE 26 SEP 20 FROM GENERAL RV IN DRAPER, UTAH I WAS INFORMED OF THE WINNEBAGO REVEL 2ND ALTERNATOR RECALL NUMBER 162 HAD TO BE COMPLETED BEFORE I DROVE THE VEHICLE OFF THE LOT. SO, I WAS TOLD [PER MANAGER MIKE MALLORY] IT WAS COMPLETED ON OCTOBER 10TH AND THUS DROVE IT OFF THE LOT ON OCTOBER 22ND, 2020. FAST FORWARD FOUR MONTHS TO FEB 2021 AS STARTED TO NOTICE A GOD-AWFUL SQUEALING SOUND WHEN I STARTED THE VEHICLE NO MATTER WHAT TEMPERATURES AND IT HAS PROGRESSIVELY GOT WORSE UP UNTIL APRIL NOW. ON 8 APRIL 21 WHILE AT A MERCEDES-BENZ DEALER IN FARMINGTON, UT I WAS TOLD THE SECONDARY ALTERNATOR WAS OUT OF ALIGNMENT AND THE ONE AND ONLY SERPENTINE BELT HAD EXCESSIVE WEAR, PLUS THE ISSUE WAS NOT A MERCEDES-BENZ WARRANTY ISSUE,, BUT RATHER A AN UP-FITTER (WINNEBAGO) PROBLEM PER MECHANIC TREVOR AND SERVICE REP ALEX! SO, ON 9 APR 21 I CONTACTED GENERAL RV AGAIN & SAID WHAT THE MERCEDES DEALER TOLD ME AND ON THE 22ND OF APRIL I PROVIDED PHOTOS OF THE ALTERNATOR ISSUE, SO THEY (PAUL DELUCA LEAD SVC REP) ORDERED THE RECALL KIT #162 FROM WB. HOWEVER, HERE'S THE REAL KICK IN THE FACE AKA COMPLAINT... WHY WOULD THEY NEED TO ORDER ANOTHER RECALL KIT WHEN THEY TOLD ME THEY STALLED IT IN OCTOBER 2020 BEFORE I COULD EVEN DRIVE IT OFF THE LOT? THEREFORE, GENERAL RV FLAT OUT LIED TO ME WHICH IS UNBELIEVABLE AND TOTALLY UNACCEPTABLE ESPECIALLY WITH THE SEVERITY OF A SERPENTINE BELT FAILURE AT SPEED EQUALS LOSS OF STEERING AND CRASH AND/OR DEATH NO TO MENTION TOTALLED VEHICLE! SECOND ISSUE/COMPLAINT IS MY ACTIVE BRAKE AND DISTANCE SENSOR BEHIND THE GRILL HAS BEEN RANDOMLY FAILING ESPECIALLY AT THE WORST TIMES I.E. LONG ROAD TRIPS! SO, THIS RENDERS THE CRUISE CONTROL & SMART BRAKING INOPERABLE WHICH IS UNACCEPTABLE ON A NEW VEHICLE WITH ONLY A FEW THOUSAND MILES ON IT. SO, I HAVE BEEN TO THE SAME MB DEALER IN FARMINGTON, UT 3NOR 4 TIMES TO FINALLY FIX IT, BUT NO FIX!!

TL* THE CONTACT OWNS A 2020 MERCEDES-BENZ SPRINTER 2500. THE CONTACT STATED THAT THE COOLANT WARNING LIGHT INTERMITTENTLY ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT HAD TAKEN THE VEHICLE TO MERCEDES-BENZ OF SPRINGFIELD (295 BURNETT RD, CHICOPEE, MA 01020) WHERE THEY DISCOVERED NO FAULT WITH THE COOLANT SYSTEM HOWEVER, THE WARNING LIGHT CONTINUED TO ILLUMINATE INTERMITTENTLY. THE CONTACT THEN PERFORMED A VIN SEARCH ON THE NHTSA WEBSITE AND DISCOVERED NHTSA CAMPAIGN NUMBER: 21V055000 (ELECTRICAL SYSTEM) AND 21V152000 (SERVICE BRAKES, HYDRAULIC) HOWEVER, THE PARTS TO DO THE RECALL REPAIRS WERE UNAVAILABLE. MERCEDES-BENZ OF SPRINGFIELD (295 BURNETT RD, CHICOPEE, MA 01020, (413) 624-4100) WAS CONTACTED AND IT WAS CONFIRMED THAT THE PARTS WERE NOT YET AVAILABLE. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE CONTACT STATED THAT THE MANUFACTURER HAD EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.

Mileage: 1,000

MERCEDES HAS LOCATED A DASHBOARD DRINK HOLDER DIRECTLY ABOVE A VENT THAT OPENS TO THE STARTER ELECTRICAL MODULE AND CIRCUIT BOARD. THE DRINK HOLDERS ARE VERY SHALLOW, AND UNSTABLE. THE LOCATION ON THE DRIVER'S SIDE DASH, NEXT TO A VENT THAT LEADS TO THE STARTER CIRCUIT BOARD IS EXTREMELY DANGEROUS. I ACCIDENTLY SPILLED COFFEE ON THE DASH DRINK HOLDERS, AND THE SUBSEQUENT SPILL LED TO THE STARTER MODULE TO SHORT CIRCUIT, STRANDING OUR SPRINTER VAN, WHICH WOULD NOT START FOR OVER AN HOUR. ONCE STARTED AND DRIVEN FOR AWHILE, THE VAN WOULD NOT TURN OFF UNTIL PUSHING THE STARTER BUTTON CONTINUALLY FOR 20 MINUTES.

Mileage: 5,200