2020 Mercedes-Benz A-Class Powertrain & Transmission Problems

While stopped at a red light, my 2020 Mercedes-Benz A220 unexpectedly shut off and shifted into Neutral without warning. All warning lights illuminated on the dashboard, and a message instructed me to release the brake and restart the engine. The vehicle restarted, but this has now happened twice. The check engine light remains illuminated most of the time. This unexpected engine shutdown creates a safety hazard because the vehicle loses power unexpectedly while in traffic. If this were to occur while crossing an intersection or during other traffic conditions, it could increase the risk of a crash. In March 2023, an independent repair facility diagnosed all four fuel injectors as leaking fuel through the electrical connections, causing circuit problems, and warned there was a fuel leak. All four fuel injectors were replaced. In October 2023, a Mercedes-Benz dealership diagnosed rough idle, misfires, lean mixture fault codes, and excessive leakage in cylinder #4. Mercedes replaced the entire cylinder head under warranty. The vehicle is now experiencing unexpected engine stalls despite these previous repairs. I am submitting this complaint because I believe the repeated engine-related failures and unexpected stalling present a potential safety concern. I am aware of a Mercedes recall involving fuel system components on certain A220 vehicles. My VIN is not included, but I am reporting this because my vehicle has experienced repeated fuel- and engine-related failures and now unexpectedly stalls.

The drivetrain/shaft is causing rumbling in the vehicle when accelerating and decelerating, typically around highway speeds. after more investigation the parts used on the a220 were also used on the gle350 that were recalled for having the same issues however the a220 wasn’t recalled for those issues.

August 2024 the dealership had my vehicle for over a month for major engine repairs after the motor mount snapped on the freeway and since then I only drove 3661 miles and I’m now convinced that they miss diagnosed and missed something It never drove the same after so on June 24th I was driving home and the engine seized and almost ejected me from the vehicle and I thank god for seatbelts The car was towed to the dealership and no loaner nor communication for 3 weeks Then tried to charge me $5000 then $3500 to do a teardown after telling me a week ago that I have catastrophic engine failure that is not fixable at all Last Thursday and Friday they did teardown to see what caused this and I am covered under warranty The service manager called me yesterday morning stating it is the 2 rod bearing that caused bright gold metal shavings in my engine oil that caused a catastrophic engine failure I requested that the service manager send me the written report so I can see He said nope it’s internal between him and Mercedes USA I explained I am the rightful owner of this vehicle and I have the right to know but more importantly I am scared and feel very unsafe to drive that vehicle again especially after the 2 times in under a year and now what about my transmission and other major components of my car Also I know they will report this car as a salvage or engine replacement under warranty on carfax which hurts the value of my car I did write a demand letter last night to Mercedes Benz consumer affairs and Mercedes USA to get me that information to protect my legal rights, warranty and resale value of my car Can you help N before the 2 major and catastrophic engine failure The electrical motor went out 2 x and had to be replaced Air bags The sunroof needed a complete replacement due to electrical Steering issues Suspension Major tire pressure issues

I was driving and I got coolant error on my dashboard. It came and then off. I pulled over and nothing seemed wrong with my engine. I restarted and headed home. The error was still on but the car was driving fine. I was trying to make it home. The car suddenly had all sorts of errors. It told me that my car was undrivable. I had no control over my car going 55 mph on a highway. I was luck to steer the car to the side of the road. Even when I was on the side of the road, I could not put it in park. It kept telling me my car was in danger of rolling away. I had my husband come meet me on the side of the road and he parked behind me so that my car did not roll away. I was on a slight incline on 32. We then waited for a tow truck. During that time, I tried to restart my car - only for it to give me undriveable, blind spot assist inoperative, errors. I could remember all of them. The tow truck guy had no idea what was going on either. My car spent 22 days at the dealership. It took them days to figure out what might be going on. Obviously the PMC module was bad. But why? They think condensation or leak from the AC hose had caused this problem. They found corrosion on the wire harness connector to PCM and on the PMC pins. They replaced the PMC and cleaned the pins. They got the car running - however, a week later, the same issue started happening. Now my battery said is was not charging. We figured it was time to change the battery anyway but it still will not turn on. I just had a full 50k service complete at this dealership in May 2024 There may be further damage to the system that the dealer realized. My car still does not run and I don't feel safe driving it when I can power it up.