2015 Mercedes-Benz C300: engine stalls while driving

Filed Aug 6, 2025 · Engine, Steering · 82,000 miles · TX

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 40 MPH, the vehicle unexpectedly veered to the left. There was no warning light illuminated. The contact stated that the steering wheel became inoperable, and the contact was unable to straighten the steering wheel. The brake pedal was also depressed. The contact attempted to depress the accelerator pedal however, the vehicle started to stall. The contact pulled over into a parking lot and was able to restart the vehicle. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 82,000.

Filed Jul 1, 2023 · Engine · WA

Engine check light code: P052E Crankcase Ventilator / oil separator. Huge problem could cause the engine to stall while driving. Could lead to an accident if you are trying to merge on the highway and the engine stalls out.

Filed Mar 2, 2023 · Engine · 90,449 miles · CA

The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the vehicle hesitated and stalled. The check engine warning light was illuminated. The vehicle was towed to Safety Auto Repair where it was diagnosed that the engine failed and needed to be replaced. The vehicle was not repaired. Neither the dealer nor the manufacturer was notified of the failure. The failure mileage was approximately 90,449.

Filed Jan 18, 2023 · Engine · NY

Oil separator failure. This a common design fault as documented by multiple complaints on the internet. This is another Mercedes Benz emission design flaw causing emission failures. This is very cheap part but extremely expensive to replace. Mercedes collects over $1200 per labor repair for each. THIS IS AN EMISSIONS POLLUTION AND SAFETY ISSUE THAT CAN BE SOLVED. PLEASE FORCE A RECALL. Engine severely smokes/stalls leaving people stranded on highways. When stuck, coolant is sucked into the engine mixing with the oil. No warning. The car

Filed Jan 5, 2023 · Engine · NV

It cuts out randomly while pressing the gas pedel to get out of the way of traffic and cuts out and stalls ive had it looked at and they say theres no check engine codes and that they cant make it do it. Theres many of people with the same issue online and the dealers wont help them either

Filed Sep 30, 2021 · Engine · CA

The engine stalled at idle numerous times when at a stop light or stop sign. This was dangerous as the other cars could have ran into my car in anticipation that I should be moving with traffic. The car was taken to the Mercedes Marin dealer service center and diagnostic was done indicating a cracked piston in cylinder one was causing loss of compression and could also cause engine failure at speed if not taken care of. Check engine light DID NOT come on. During research on repairs for this issue, it became apparent that Mercedes Benz is aware of this issue in many of its engines of this model and year, but did nothing to remedy the situation or the underlying manufacturing defect that causes the cracked piston. In addition, Mercedes is unwilling to cover the cost of repair or replacement (car has only. 49,000 miles, but is out of warranty due to age).

Filed May 13, 2021 · Electrical, Engine · NJ

The car has intermittent starting issues more noticeably during eco start / stop process. When car does an eco stop at red light or stop but it is unable to restart consistently (10-20% fail rate). All dashboard lights come on and car is stalled. Car can roll if on a hill. Car can be restarted by turning car on and off manually. Only error code is p1ce200 but the manufacturer suggested steps do no solve problem. Battery, auxillary battery, starter, voltage dip limiter, battery sensor, starter relay were replaced. Delear unable to find problem and says all software is up to date.

Filed Feb 21, 2021 · Acceleration, Driver assistance · 91,000 miles · WI

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. My thought was the battery is a dud (was replaced the day prior), the car needs a software reboot due to the new battery or car was not connected to the "memory saver" correctly. Or the sensors were dirty. So I did the easiest. I washed the car. This problem continued to happen 5-6 times more over the next few days stalling on the freeway at 65-75 MPH. Extremely dangerous & life threatening. No engine problems apparent. Seems to be radar or software. This is extremely dangerous while on the highway, I found many other with this same issue on the federal safety agency. I attached a picture of car showing message with no power. My seatbelt was off as I was on side of road trying to get to gas station. This issue is cleared by turning car on / off. Then it happens again hours or a day later, loss of power at highway speeds. Coast over.

Filed Jan 8, 2021 · Engine · 48,000 miles · NY

Tl* the contact owns a 2015 mercedes-benz c300. The contact stated that while attempting to accelerate from a stop light, a loud sound came from the engine compartment and the vehicle began to vibrate and shake before stalling. The vehicle was towed to the local dealer keeler mercedes benz located at 1111 troy schenectady rd, latham, ny 12110 who diagnosed that the engine was faulty and needed to be replaced. The cause of the engine failure was not provided. The manufacturer was notified of the failure. The failure mileage was 48,000. ## VIN passed ## mercedes-benz 2015 c300 amg ##

Filed Nov 14, 2019 · Fuel system · 30,000 miles · NJ

Tl* the contact owns a 2015 mercedes-benz c300w4. When the contact entered the vehicle, he noticed a fuel odor. While the vehicle was stopped at a traffic light, it stalled and began to roll backwards without warning. The contact took the vehicle to mercedes-benz of paramus (755 nj-17, paramus, nj 07652, (201) 977-6365) and was informed that the fuel hose and the fuel line needed to be replaced. The manufacturer was notified of the failure and offered little assistance. The vehicle was not repaired. The failure mileage was approximately 30,000.

Filed Mar 22, 2018 · Engine, Transmission · 46,500 miles · NJ

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. Looked online and so many people are complaining the same. The whole of dashboard lights up like when a car stalls. This is very dangerous. Anybody waiting behind you can take the pedal from the brake and smash into you. Similarly, for last 2 months, I have noticed that there is a jumping nature when you take leg of the brake at the signal. That scares me as well. From the feel of it, I feel this is primarily a software issue where the computer thinks it is in some mode when it is not or something and shuts everything down as a precautionary measure or something

Filed Apr 11, 2017 · Brakes, Fuel system · 9,800 miles · FL

Tl* the contact owns a 2015 mercedes-benz c300. While driving at an unknown speed, the vehicle stalled. While applying the brake pedal, the vehicle made an abnormal noise and jerked. The vehicle was taken to the dealer on three occasions where it was diagnosed that the fuel injectors needed to be repaired. The vehicle was repaired. The failure mileage was 9,800.