Mercedes-Benz C300 warning lights comes on

Filed Oct 9, 2026 · Electrical · NY

All of the lights in my rear driver side taillight stopped working. I had it looked at and there was oxidation at the ground connection which caused overheating and melted the plastic, leaving burn marks on the gray plastic piece. I see a safety bulletin for this exact issue for model years 2008-2011, but not my 2013. This is dangerous.

Filed Oct 11, 2025 · Acceleration, Electrical · CA

On Friday [XXX] at approximately [XXX]. My wife and I were driving our 2024 C-Class 300 (~8,000 miles on this vehicle) on [XXX] and entering the intersection of [XXX]. Riverside, CA 92506 when all of sudden the car just died (the engine stopped running, pushing the gas pedal with no power) and all the dashboard lights came on flashing like crazy. This incident paced my wife and I in a very venerable bad not safe situation. If there was any traffic at in this intersection at that moment it would have been a bad situation. I called MB Walter's they could hear the sounds which were loud and they ask me to open and close the doors to see if sound would stop and wait 5 minutes and try to restart. Waited 5 minutes car started and we drove it to Walter's. The week before I had it back in the service department because the finger print function was not working any longer. They supposedly replaced the software package and then this major issue happen. The service department at Walter's has tried at least two times to download a new software package however this vehicle is not allowing it to accept it. They said engineers from the East coast were trying to help but nothing has been accomplished. It is becoming frustrating and allowing the overall safety concern has been increasing for my wife and I. What if this happens again and we are on the freeway or a street with traffic which both situations could cause a severe accident and harm. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 11, 2022 · Airbags, Lights · GA

I purchased the vehicle in 2010 & immediately had to have the electrical system for all lights replaced. The lights on the vehicle goes out every 2 mos as if theres an electrical issue. Air bags had a recall & have been replaced now the system states there is a malfunction. This started 09/08/22.

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 Jan 23, 2020 · Engine · 47,600 miles · FL

On a 4 lane boulevard close to home I pulled out to pass a slow car and noticed a car coming up from behind at a high rate. I pushed the accelerator to the floor, the car started accelerating then lost all power. The engine had cut off and all the dash lights were on. I rolled to a stop, as far off the road as I could. After a few seconds I restarted the car and drove home. Similar incidents can be found on you tube but not for a c300. The ones I found were for a c240 mercedes. They say the problem is due to the computer shutting down the engine because it can't properly balance the fuel to air ratios. This seems logical because I have never had to accelerate like this before. This could have been catastrophic if I would have been pulling out into fast traffic on a busy highway and the engine shuts down. Now I 'm afraid it will happen again. I just don't know when. All I can do is try not to press down on the accelerator too far. The dealer said nothing was in the car's computer memory so he couldn't do anything. I'm suspicious of that because if they admit there is a problem then they would be expected to fix it. I think they know there is a problem but don't know what to do about it.

Filed Apr 24, 2019 · Electrical, Steering · FL

On 7/30/18 I was stranded in the middle of the street after the coolant malfunction light came on. The car began overheating, and there was no AC. I waited for roadside assistance more than 3 hours. I was informed of the incorrect positioning of the alternator from manufacturing, which resulted in multiple lights on cluster. They found the engine belt fell off & replaced the v-belt. They performed li13.22-p-060187, and released stress of alternator and corrected torque. They also worked on a campaign/recall (#2018070005) I had not been informed of. On 3/15/19 during the scheduled 20k service, they tested battery test code with cabin filters wipers and brake fluid service and performed a vehicle inspection. On 3/19/19, 4 days after the scheduled 20k service, I was stranded in the middle of us1 during rush hour traffic on my way to work. The coolant light came again. Thankfully, I safely avoided an accident after the car turned off in the middle of the street. The report showed a weak crank & battery message on the cluster display. They tested the battery and found code hr250bt-dad4lfb stating, 'replace battery'. They removed a0019820208 date 45/16 and installed a0019829108 date 03/18. The drive belt had come off the drive system & found li13.22-p-060187, which stated they needed to perform an alignment procedure of the alternator and installed a new belt for the 2nd time. The belt actually caused damage to the tensioning device, which resulted in them replacing the tensioner, and performing the instruction for li. They test drove the car & said it was fixed. On 4/4/19, just 3 days after picking up my car, it turned off on my again in the middle of us1. The battery light came on and a message popped up stating that the system would shut down in 3 minutes. I was lucky enough to avoid an accident on a congested road.

Filed Apr 18, 2019 · Transmission · 29,000 miles · NY

When idling at the light. The car would shut itself off. All the warning lights will come on. I then have to restart the car with the push start to reset it. Then it'll work fine. I have been to mercedes dealership in new rochelle for four times about this issue. They changed the battery the first time. Two days later the situation occurred again. Then the second and third time they gave me back the car and said they didn't see anything wrong because no codes popped up. Both times I took the car back and the situation occurred again. This problem has occurred over 30 times since over 29,000 miles. The dealership is trying to figure out the issue and right now I am in a loaner vehicle on the fourth time that I have given my car in for service because of this situation. The incident is dangerous in that one time I was in an intersection and it shut off on me. Cars going the opposite way almost hit me because of my reaction time to put the car on start and then restart the car. This can be potentially dangerous for possible accidents. In addition, I have looked online and similar problems have occurred with older models and other models.

Filed Mar 8, 2019 · Electrical, Fuel system · 50,100 miles · FL

In february 2019 the c300 engine light came on, took the vehicle to the dealer and they said it was a bad catalytic convertor, and the dealer took three days to repair it. Three weeks later in march 2019, while driving 25 miles per hour straight on a residential street the car shut off without a sound, all the lights on the instrument cluster lit up, and the car coasted to a stop on the side of the road. I trie to restart the car, the starter made noise but the engine would not turn over. I called roadside assistance and did the three time lock and unlock routine, and the car would not start. After towing the car back to the same dealer, they told me the car was showing no codes, the issue could not be replicated and the car should be fine to drive again! I'm now afraid to drive the vehicle, and the dealer is refusing to fix it.

Filed Aug 14, 2018 · Electrical · 46,350 miles · MI

My mercedes benz c-300 4matic got rain water on the inside of the car and damaged the electrical. The car was parked on the street and all the windows was up. The drivers and passenger side of the car in the front under the dashboard was soaking wet from rain water. I do not know how the water got inside of the car. I was driving it after a rain storm and all the dash lights came on all the needle hands went down to zero, it was like the car was trying to restarting itself while I was driving. The car is now at mercedes benz novi michigan now. I still owe money on this car I am so disappointed with mercedes benz. I read somewhere about a class action lawsuit regarding water coming inside of the mercedes.

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