2012 Mercedes-Benz E350 electrical problems

Filed Sep 16, 2026 · Electrical, Seats · FL

The vehicle was parked when the steering wheel locked , and the headrest. The electrical for my headlight driver side low beam gave me a warning lamp message.

Filed May 15, 2026 · Electrical, Fuel system · 35,000 miles · AZ

The contact owns a 2012 Mercedes- Benz E350. The contact stated while operating the vehicle the odor of fuel was present coming from the vehicle. Upon inspection it was discovered that the fuel had leaked from the vehicle. The vehicle was taken to the local dealer who diagnosed that the fuel pump had failed and needed to be replaced. The vehicle was not yet repaired. Also, the contact indicated that the front driver seat heat element had overheated and cause melting to the seat cushion. The vehicle was taken to the local dealer who diagnosed that the front driver seat needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failures but no assistance was offered. The failure mileage was 35,000.

Filed May 17, 2025 · Electrical, Steering · FL

Steering wheel lock module steering wheel was locked in place and vehicle wouldn’t do anything.

Filed Sep 30, 2022 · Electrical, Engine · CA

Camshaft sensors and solenoid leak oil internally which then gets into the sensors electrical connector. From the the oil enters the engine wire harness through capillary action maki g it’s way to other sensors and ultimately the DME (Digital Motor Electronics). This can cause February DME to fail which in turn can make the engine stop running.

Filed Dec 15, 2021 · Electrical, Transmission · MN

The camshaft position sensors leak oil into wiring harness. The oil circulates to other engine sensors and the ECU(engine control computer). Oil in the other sensors and the ECU causes the car to stop operating or operate erratically while driving. a real problem. This is a safety issue there should not be oil leaking into the ECU! The mercedes dealer replaced the leaking camshaft position sensors and confirmed oil had leaked into the ECU and wiring harness on december 13,2021. They recommended replacing the wiring harness and ECU at cost of $6500. I have the replaced bad sensors. Mercedes says they have no culpability in this or a fix. The mercedes complaint number is #23264730932. The previous mercedes engine generation had the same problem and mercedes did a recall on that engine.

Filed Nov 4, 2021 · Electrical, Engine · TX

Cam adjustment solenoids leak oil into the engine wiring harness causing component failures, rough running and stalling. This problem was diagnosed and replaced by the dealer at 48k miles and has returned at 116k miles. There is a recall for models prior to 2012 and this car has the same problem. Eventually the engine will quit running at any given moment posing a dangerous situation.

Filed Sep 8, 2021 · Electrical, Transmission · NJ

My vehicle when coming to a stop throws itself in the park around 5 mph. I have almost gotten hit by vehicles behind me several times.

Filed Jun 10, 2021 · Electrical · TX

50% of the time car is placed in reverse back up camera screen has no picture just a black screen. Mercedes benz of austin ran diagnostics but could not find a problem. I am aware that there is a recall for earlier models on the back up camera but recall does not include 2012 e350. Problem started about 2 years or so ago. It is an intermittent problem starting about 2 years ago and has been ongoing.

Filed Jun 4, 2021 · Electrical · CO

The key in the electronic ignition switch is not recognized causing the car to suddenly throw itself into park while the vehicle is still in motion, at speeds as high as 6 mph, per service bulletin #LI54.25-P-056472. The issue is intermittent and unpredictable and puts the driver at great risk of an accident because the car stops violently and without warning to the cars behind. The car can be put back into Drive and as soon as you start driving again, it will immediately throw itself back into park, which sometimes happens over and over again. This has put me in the position of having entered an intersection only to have my car stop in the middle of the intersection. I've been nearly hit from behind or side several times due to the unexpected and sudden stop my car made when this happened. Despite reporting the TSB to the Mercedes dealership, they would not cover the out of warranty repair because they said it's "only a service bulletin and not a safety recall." This is VERY CLEARLY a safety issue and there are hundreds if not thousands of drivers and cars affected based on internet searches of MB and auto forums.

Filed May 25, 2021 · Driver assistance, Electrical · VA

1. Backup camera will periodically display a blank screen when shifted into reverse. System has to be shutdown and restarted to get the camera to work again. Tends to happen on rainy days when camera most needed. No accident has occurred as a result to date. Date of last occurrence is an approximation. 2. Distronic Plus system (Adaptive cruise) will disengage unexpectedly when coming to a stop in traffic or if in stop and go traffic. The system beeps once and a red light flashes, but this is easily missed if radio is playing or driver is distracted. This has almost caused several roll forward rear-end collisions, prevented only by quick driver intervention. Neither issue has been addressed with the dealer since the vehicle is out of warranty.