2012 Mercedes-Benz S350 problems

Filed Nov 21, 2019 · Engine · 70,000 miles · NY

Engine has oil leak similar to many 2011-2012 diesel model.

Filed Nov 28, 2016 · Engine, Transmission · 54,500 miles · NV

I did some research on mercedes 3.0l diesel motors and there seems to be an issue with the seal failing about 50,000 miles causing the motor to leak oil and the seal as well as the oil cooler need to be replaced. It is such a common problem on the 3.0l diesel engines that when you call any repair shop the first thing they ask is if the car is a diesel. Also the seal replacement is all over the mercedes blogs saying the same issue on the 3.0l diesels. Thought it might be something to look into as it is an engine seal problem and is occurring consistently in all the 3.0l diesels in the s class, e class, ml class, g class. All models that mercedes sold the 3.0l engine in the us.

Filed Nov 16, 2016 · Acceleration, Fuel system · 57,000 miles · GA

"takata recall" the vehicle slips into a limp mode while driving. This have happened several times. I'm taking it to the mb dealer this weekend. 11/16/2016. 57kmiles

Filed Aug 30, 2016 · Fuel system · 61,750 miles · MD

Vehicle entered limp home mode while entering intersection. Dealership said codes did not indicate an issue and could not reproduce problem. Only actions taken was a computer test and road test. After leaving the dealer, the vehicle entered the limp home mode again this time on the highway. Dealer then replaced two sensors at the turbo. After returning the vehicle to me, it entered the limp home mode again, also while driving on the highway. This time, dealer replaced the turbo when it was brought back in for repair. The vehicle still entered the limp home mode after this repair. So the dealer has also replaced the catalytic converter. Problem still persisted and caused a hose to rupture. This was replaced and the problem still persists after a month of troubleshooting and parts replacing.

Filed Mar 30, 2016 · Transmission · 52,000 miles · CA

While driving at freeway speeds car went into limp mode. Engine rmp were limited to 1500rpm and speed dropped to 25mph.this happened 3 times during week of 3/14/16 and again on 3/22/16. Had to make defensive emergency maneuver to steer the car away from the traffic lanes and stop on the side of the freeway. Was almost rear ended by a semi. Car had to be turned off and restarted to come back to normal driving mode. Car was taken to mercedes dealer and it was diagnosed to be a bad torque converter causing this limp mode. Dealer repaired the car by replacing the torque converter. There was no check engine light. When the dealer hooked up their computer there were codes for bad torque converter.

Filed Apr 21, 2015 · Acceleration, Engine · 50,000 miles · CA

Tl* the contact owns a 2012 mercedes benz s350. While driving approximately 65 MPH, the vehicle decelerated without warning. The contact then coasted over to the emergency lane and there were no warning lights illuminated. The vehicle restarted; however, the failure recurred multiple times. The vehicle was taken to the dealer for diagnostic testing. The technician diagnosed that the side charge air hose into the throttle actuator was torn and caused the loss of hose pressure. Both the left and right hose needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 50,000.

Filed Apr 3, 2015 · 25,000 miles · GA

When I closed the hood, a section of the radiator grill broke.