2012 Mercedes-Benz E350 Problems & Complaints

Most common 2012 Mercedes-Benz E350 problems

• Air bags~50,000 miles
  8439%
• Fuel & propulsion system~90,000 miles
  3516%
• Engine & cooling~82,000 miles
  2110%
• Brakes~160,000 miles
  209%
• Electrical system~72,000 miles
  188%
• Other / not specified~50,000 miles
  178%
• Suspension~170,000 miles
  146%
• Transmission & drivetrain~20,000 miles
  105%
• Steering~70,000 miles
  94%
• Body & structure~92,000 miles
  84%
• Seats~55,000 miles
  84%
• Wheels & tires~21,000 miles
  63%
• Seat belts~61,000 miles
  42%
• Driver assistance
  42%
• Windows, wipers & sunroof~0 miles
  10%
• Stability & traction control~30,000 miles
  10%
• A/C & heater~35,000 miles
  10%

Share of the 217 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.

Mercedes-Benz E350 complaints by model year

Best E350 years: 2017, 2015, 2020. Years to avoid: 2014, 2011, 2012, 2013, 2006. Compare all years →

2012 Mercedes-Benz E350 recalls (7)

NHTSA defect investigations

Federal safety investigators have looked into 2 possible defects involving the 2012 Mercedes-Benz E350:

What 2012 Mercedes-Benz E350 owners say

Air bags all 84 →

The contact owns a 2012 Mercedes-Benz E350. The contact stated that the front driver's side and passenger's side air bags warning lights were illuminated. Additionally, the contact stated while driving at an undisclosed speed, the headrest deployed inadvertently. No further information was provided. The message "Pre-safe Inoperable - Check Owner's Manual" was displayed. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact of an unknown passenger's side air bag recall repair that was previously performed on the vehicle. The failure mileage was approximately 105,000.

Stopped at a stop sign and the passenger side seat headrest deployed. Luckily no one was sitting in the seat at the time. This car has the Neck Pro Active Front Head Restraints. The plastic that holds the headrest in place fails after time. There is a class action lawsuit against Mercedes and the manufacturer of the plastic piece Gammer I believe. This failure has caused injuries to people that have been sitting in the seat at the time of deployment for no reason. This is a safety hazard as if it goes off while driving can cause you to loose control of the car and injure anyone in the car as well as other people if you were to get in an accident with another vehicle. This should be a recall.

Fuel & propulsion system all 35 →

The contact owns a 2012 Mercedes-Benz E350. The contact stated that there was a fuel odor inside and outside the vehicle. The contact stated that after lifting the rear seats, he became aware of a puddle of fuel near the housing. There was no warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the fuel filter flange had failed, and the fuel assembly needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 12V557000 (Fuel System, Gasoline). The manufacture was notified of the failure and the contact was informed that the VIN was not included in the recall. The contact was advised to contact the NHTSA Hotline for assistance. The failure mileage was approximately 200,000.

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.

Engine & cooling all 21 →

The contact owns a 2012 Mercedes-Benz E-350. The contact stated that while attempting to start the vehicle, the check engine warning light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed with a failed crankshaft sensor. The contact stated that the crankshaft sensor was replaced; however, the failure reoccurred. The vehicle was taken to another independent mechanic where the contact was informed that the crank shaft sensor needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken to another independent mechanic, and the crankshaft sensor was replaced. The vehicle was repaired, but the failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 152,000.

The contact owns a 2012 Mercedes-Benz E350. The contact stated that after retrieving the vehicle from the dealer, the check engine warning light was illuminated. The vehicle was taken back to the dealer where it was diagnosed that there was oil contamination through the camshaft sensor. The contact was informed that the engine wiring harness needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic for confirmation of the diagnosis. The manufacturer was notified of the failure. The approximate failure mileage was 54,700. The VIN was not provided.

2012 Mercedes-Benz E350 engines & fuel economy

EPA ratings. Class: Midsize car.