2014 Mercedes-Benz E350 electrical system problems

Related recalls

• Recall 19V787000Nov 1, 201924,226 vehicles
  COMMUNICATION

  Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V787-4620.pdf

  Risk: An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.

  Remedy: MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge. The recall began December 23, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019120008.

• Recall 17V177000Mar 14, 201751 vehicles
  AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVE · ELECTRICAL SYSTEM:SOFTWARE

  Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 AMG GT-S, GLC300, CLA250 and GLE300d 4Matic vehicles, 2013 C250, E350 BlueTec and G63 AMG vehicles, 2008-2014 C300 vehicles, 2013-2014 C300 4Matic and ML350 4Matic vehicles, 2009 C350 vehicles, 2014 CLS550, E350 4Matic, E350 Coupe 4Matic, E350 Wagon 4Matic, GLK350 and SL550 vehicles, 2012 CLS550 4Matic vehicles, 2012-2016 E350 vehicles, 2016-2017 GL450 4Matic vehicles, 2012-2014 ML350 4Matic BlueTec vehicles, 2015 S550, S550 4Matic and C300 4Matic Sedan vehicles, 2015-2016 C300 Sedan vehicles, and 2017 SL63 AMG vehicles. Various control units on these vehicles may have been updated with incorrect software, potentially affecting the correct deployment of the air bags in the event of a crash.

  Risk: If the air bags do not deploy as intended in the event of a crash, there would be an increased risk of injury in the event of a crash.

  Remedy: MBUSA will notify owners, and dealers will update software in the affected control units, free of charge. The recall began April 21, 2017. Owners may contact MBUSA customer service at 1-800-367-6372.

What owners say

1. Filed Sep 4, 2025300,000 miKYElectrical System

   Odometer Fraud. The contact purchased a 2014 Mercedes-Benz E350. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the mileage was 109,550. It was later discovered that the mileage on the Title was approximately 300,000.

   NHTSA complaint #11685019 · source
2. Filed Jul 31, 2025CAFireElectrical System

   I've had the car for 3 years and its all stock. It has 38,500 miles and today out of no where the driver side speaker in the door started making a crackling and popping noise. Smoke started coming from the speaker and filled the cabin. I quickly pulled over and turned off the car, because the smell of plastic burning was horrible. I was immediately alarmed by this and let the car cool down. I started driving again and it started again crackling and alot of smoke coming from…

   NHTSA complaint #11677680 · source
3. Filed Dec 30, 2024SCFireElectrical System

   While driving in stop and go traffic I heard a loud popping noise from the dash area and smoke started filling the cabin. I called a DC area dealer service dept and was told to exit the DC beltway and un plug the audio amplifier in the trunk left access door That stopped the popping noise and the smoke .

   NHTSA complaint #11633188 · source
4. Filed Dec 14, 2024CAElectrical SystemOther / Unknown

   The heater temperature is not consistent and keeps fluctuating. When I set the temperature to 80°F, it initially blows hot air, but after about 10 seconds, it starts blowing colder air. To get consistently hot air, I have to set the temperature to the maximum.

   NHTSA complaint #11630673 · source
5. Filed May 26, 2024NYBrakesElectrical SystemSuspension

   Suspension Rear Sub-frame rusted through, rear Lower control arm disconnected from rear sub-frame due to rust/corrosion. It is available for inspection. While braking at highway speeds the car fishtailed and I almost lost control of the vehicle. This has not been confirmed or inspected by any service, Insurance or Police entity. No warning lights, messages etc. Brakes: Rear brake lines are severely corroded in the same area as the rear sub-frame. Electrical System: Battery…

   NHTSA complaint #11590808 · source
6. Filed May 22, 2024ILFireElectrical System

   While driving in traffic there were loud popping and crackling sounds from the rear speakers. Then smoke appeared and an acrid burning smell. The smoke and loud sounds continued after I pulled over and turned the key off. I removed the fuses for the sound system and it remains inoperable. I went home and searched for this problem on the web and discovered that it is a common problem on 2014 Mercedes E350's. Despite this being cited as a common problem by owners, there is no…

   NHTSA complaint #11590052 · source
7. Filed Apr 19, 2024CAElectrical SystemEngine

   My 2014 Mercedes started getting a fault light with multiple performance issues. Mercedes dealer where I can carry out my routine maintenance diagnosed the issue to the electrical harness being contaminated with engine oil and it needed to be replaced on the engine because of a known issue whereby oil from the upper camshaft sensors seep into the harness and makes its way to ECU and causes possible failure of the engine control, which could lead to shutting down or worse,…

   NHTSA complaint #11584134 · source
8. Filed Oct 12, 2023OHElectrical System

   While cruising , car stalled after it beeped intermittently for a few minutes . On checking , the shop found that ignition switch assembly module has failed & stopped working . Strangely , the Mercedes-Benz dealer on Montgomery Road , Cincinnati refused to fix this , though the car was initially towed to them . This is suspicious action on the part of Mercedes-Benz dealer . The dealer acted as if they do not want this problem to become public .

   NHTSA complaint #11549545 · source
9. Filed Aug 28, 2023NJElectrical System

   Electrical burning smell and buzzing coming from car entertainment system speakers. Did not stop even when entertainment system was turned off. Had engineer diagnose and issue is the rear subwoofer. Had to remove fuse or disconnect cables to stop issue.

   NHTSA complaint #11541131 · source
10. Filed Apr 12, 2023MAElectrical SystemSteering

    My electric power steering failed. It often resets and can be unpredictable when it wants to fail again. It’s an intermittent problem that local dealer tried to fix with a software update but did not work. I was told I need a new steering rack at $5-6k which is unacceptable for any vehicle that has been maintained it’s whole life . My car is 8 years old with 100,000 miles with full service records I feel like this is a premature failure of the electric power steering

    NHTSA complaint #11516639 · source
11. Filed Jan 19, 2023NCElectrical System

    The contact owns a 2014 Mercedes-Benz E350. The contact stated that the Push to START button failed to operate as needed. Due to the failure, the contact was only able to start the vehicle using the key fob. The vehicle was taken to a dealer where she was informed that due to an apparent electrical failure, the vehicle would also fail to start with the key fob. The contact was informed that the failure was unrepairable. The manufacturer was not notified of the failure. The…

    NHTSA complaint #11502666 · source
12. Filed Oct 24, 2022CAElectrical System

    Speaker(s) caught fire and sent smoke into car while driving. Dealer recognized issue immediately and said they have seen this before a few times. Mercedes said car is not in warranty son they will not support approx. bill of $4,000. The issue was discussed in various forums by several owners. I would like to see that Mercdes act responsibly and address the issue appropriately. Smoke coming into car while driving is hazardous in addition to hindering visibility and…

    NHTSA complaint #11490698 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology