2015 Mercedes-Benz C300 Transmission and drivetrain Problems

“I was driving on a rural back road at 30 miles, the power steering stopped working. A warning appeared saying malfunction of power steering . I was able to drive home, about one mile, but with great difficulty. I called mercedes benz. They sent a tow truck and towed auto to westwood mercedes in westwood, ma. I was informed it was a software problem and it had been reprogrammed.”

“On february 9th, during my morning commute on the interstate the car lost power to the drivetrain. Message that displays was collision assist plus inoperative along with cruise control inoperative. With an amber esp light illuminated, there was no engine light on. When this message appeared the car would no longer accelerate (limp mode). In avoidance to being in a rear end collision I quickly pulled over, turned off the car and turned back on. Inoperative message, limp mode and esp light was cleared. I called dealer to notify. …”

“Was driving on city street, and the collision prevention assist disabled warning sign came on and I lost power to the car. I'm told this is called limp mode. I tried to pick up speed by pressing throttle to the floor, but got no reaction at all. Then some power came back, but not much. Each time I braked to stop for light or turn this would happen. After I got home I restarted the engine and it seemed normal again. However I was afraid to drive it, especially since in the last six months my power steering also failed, and had it towed to dealer. …”

“Dont know which category it falls. I bought this car in august 2015. In one week it would not start even. Towed to dealership and they said, the grounding screw was loose. I am so surprised that a car comes out from factory with a loose grounding issue. In the last 2 weeks, the car just stalled at the signal. All lights came up. I had the eco start/stop mode on. This happened 3 times and finally I shut the eco start/stop mode down. It is so dangerous that in heavy traffic, when people are ready to drive on change of signal, the car wont move, people are honking and frustrated and I am too. …”

“The 7 speed transmission shifts very hard from 1 gear to 2 gear to 3 gear. From 3 gear all the way to 7 gear is very smooth. Also the same way around when you downshift from 3 gear to 2 gear to 1 gear. The slowing down is very harsh and it looks like the transmission doesn't understand that the car is going to a full stop. All the power and speed cut down a few seconds before full stop. I have personally tried to do the reset with key and pedal trick but it only works for a day or two and goes right back to the rough shifting.”