12 of the 514 complaints about the 2015 Mercedes Benz C300 are about the driver-assist systems — 2% of everything reported for this model year. Half of the failures with a mileage on record happened before 32,000 miles.
12
Complaints
1
Crashes
0
Fires
0
Injuries
Filed with NHTSA, in their own words.
LANE DEPARTURE: BLIND SPOT DETECTION
Check engine light came on, it has to be with the Positive Crankcase Ventilation Valve. So I found out that other people are experiencing the same thing. So I know that there is a recall by the manufacturer. And I want to do the same for me.
NHTSA complaint #11641447 — an unverified report by a vehicle owner.
LANE DEPARTURE: BLIND SPOT DETECTION
Blind Spot Assis Inoperative. This message appears on dashboard showing the malfunction of the blind spot sensors. This always happen when the weather temp is hot and also while driving during rain. This concern is putting me, my wife and kids in high risk and unsafe driving condition. I did some research and found out that the manufacture of this car put these electronic sensors inside the rear bumper behind both rear wheels and are exposed so whenever driving, rain, dirt, salt and all road debris splash all over these electronic sensor causing them to corrode and destroyed as a result of water and salt getting inside these fragile electronic sensors and then, the whole blind spot system inoperative and of course high risk to get involved into an accident.
NHTSA complaint #11537702 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
Engine Crankcase (pcv) Problems on Mercedes Benz C300 and harness issue. I’ve noticed this is a very common issue many owners as myself have experienced and no action for a recall.
NHTSA complaint #11532943 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
Mercedes 2015 C300 crank case ventilation hose has a defect and it is well-known to the manufacturer. This causes recurring engine and exhaust problems for a large number of car owners, and it should be part of a recall.
NHTSA complaint #11529358 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
I took my vehicle to the dealership to have recall worked on (top sunroof panel) apparently they refused to work on it because my sunroof is not working. I received a letter after i financed the vehicle stating that there was a recall so to take it in to the dealership and if sunroof needed to be fixed it would. Long story short, back in July the panel detached from my vehicle while i was on the freeway. Thankfully I didn’t cause an accident but I would like some help so the dealership can fix the recall.
NHTSA complaint #11479093 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
I took my vehicle to the dealership to have recall worked on (top sunroof panel) apparently they refused to work on it because my sunroof is not working. I received a letter after i financed the vehicle stating that there was a recall so to take it in to the dealership and if sunroof needed to be fixed it would. Long story short, back in July the panel detached from my vehicle while i was on the freeway. Thankfully I didn’t cause an accident but I would like some help so the dealership can fix the recall.
NHTSA complaint #11479093 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
Reported to local dealer and corporate office about the issues with shift module not shifting at random, meaning that the vehicle won't shift from park to drive or reverse, and so forth. The local dealer tried to reprogram the software, but the problem still persists. When plugging in my OBD II & DTC readers, code U0103 appairs which translates to "Lost communication with gear shift control module". My concern with this is that I've had this issue while in traffic, which would make my vehicle a hazard. When it comes to the collision prevention system, the system randomly turns on and off, meaning that when it's needed it might turn on, but when it's not needed it randomly turns on. Once again, addressed this with a local dealer and Mercedes Benz corporate with no avail. My concerns here is that the vehicle could prematurely brake causing an accident or not brake at all causing an accident.
NHTSA complaint #11476508 — an unverified report by a vehicle owner.
LANE DEPARTURE: BLIND SPOT DETECTION
THE C300 4MATIC SPECIFICALLY SHOULD BE RECALLED BECAUSE SOMETHING NEAR THE FRONT END SQUEAKS AND MAKES ALL TYPES OF NOISES
NHTSA complaint #11405111 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
CHECK ENGINE LIGHT KEEPS COMING ON/ FOWL ORDER COMING FROM AC UNIT/ LOUD GAS SMELL WHEN START IGNITION IN THE MORNING
NHTSA complaint #11404560 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: WARNINGS
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 NHTSA. 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.
NHTSA complaint #11397252 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
I WAS DRIVING AT APPROX. 20-25 MPH DURING DAY LIGHT AND ALL OF A SUDDEN THERE WAS LIGHT BLINKED ON MY DASHBOARD FOR APPLYING THE BRAKES BECAUSE OF ANOTHER VEHICLE AHEAD OF ME. I APPLIED THE BRAKES AS WELL AS BRAKE ASSIST PLUS SYSTEM GOT ACTIVATED AS WELL. BUT STILL MY VEHICLE END UP HITTING THE VEHICLE AHEAD OF ME. THE BRAKE ASSIST PLUS SYSTEM WHICH IS CLAIMED BY MERCEDEZ TO TAKE BRAKE AUTOMATICALLY TO BRING THE SYSTEM TO HALT IN CASE OF EMERGENCY DID NOT WORK AND IT END UP HITTING ANOTHER VEHICLE IN FRONT OF MY VEHICLE
NHTSA complaint #11074407 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE
TL* THE CONTACT OWNS A 2015 MERCEDES-BENZ C300. WHEN THE VEHICLE WAS STARTED, THE COLLISION PREVENTION ASSIST PLUS INOPERATIVE WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT RODENTS CHEWED THE WIRING AND THE WIRING HARNESS NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 1,800.
NHTSA complaint #10926485 — an unverified report by a vehicle owner.