What 317 owners told NHTSA about the 2016 Mercedes-benz C-class Phev

I’ve been driving my car since September when it was purchased I just got it from dealership 4/9/26 spent over $1100 and have been working like regular full time schedule, I wake up today 4/27/26 trying to work and car is stalling. Not sure what’s going on with these mechanics and technicians. I pay to dollar to ensure my family safety on the road here I am stuck without support due to my circumstances. Also, my car just idles the shuts off doesn’t turn mall the way on, magically a check engine light flashed then car just immediately stalled and won’t turn back over all the way.

NHTSA ODI 11733961

My C300 MBZ, 2016 is experiencing the same symptoms as indicated in a recall, but my vehicle is not included in that recall. Camshaft: GENERAL REPAIR A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion or vice versa. Cams act as a vital component to your automobile's engine. A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part. Camshafts provide power to the cams which are vital for basic engine operation. The cost of fixing this approximately $10,000 per Mercerdes dealer and estimate from Keyes Mercerdes. The Brief: Mercedes-Benz issued a recall for some model cars tied to a faulty drive shaft.T he problem not only can cause vehicles to lose power but may elevate crash risk, according to the National Traffic Safety Administration. Owners of the affected vehicles can take them to their local dealership to receive free repairs, however per MBZ corporate 2016 C300 not included? Mercedes-Benz is recalling 24,092 cars connected to a drive shaft universal joint that may break, resulting in a sudden loss of drive power.

NHTSA ODI 11733625

The contact owns a 2016 Mercedes-Benz C300. The contact stated that while at a stoplight, the energy saver START/STOP feature engaged, but the vehicle stalled and failed to restart. There were no warning lights illuminated. The vehicle was towed to an independent mechanic who determined that the START/STOP function failed to operate as designed. The mechanic informed the contact about NHTSA Campaign Number: 17V114000 (Electrical System, Engine and Engine Cooling). The local dealer was not contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 56,000.

NHTSA ODI 11675352

While driving, my vehicle suddenly shut down in the middle of traffic without any prior warning. I was left stranded in the hot sun, fearing for my safety and praying that I wouldn’t be rear-ended. The incident was not only terrifying but also unacceptable for a vehicle of this caliber. I contact Mercedes customer service. I spoke to a representative name Stephanie. She called the Mercedes dealership service department in Columbus, Ga and received confirmation that my car did shut completely down on me without warning. Stephanie stated she will notate the incident. I told her there should be more than just a notation because this put me in grave danger, not only was my life in jeopardy this is a serious potential threat to others.

NHTSA ODI 11662614

When I was driving down the road my car got a message on the dash that said power steering malfunction see owners manual. My steering wheel got locked up and tight it was hard to keep control of my car at 60 miles per hour. When I took it to the repair shop, I asked about the repair and if my Vin had a recall and when I looked up the production date of my car it's 2 numbers off the Vin numbers that were recalled for your. same issue with hat happened in 2016 when my car was produced in 2015, it says the same thing. It will cost like 5k to fix the problem due to the fact that its a sensor, and when I looked up the recall it was the same sensor that the recall was on with my Vin only being 2 numbers off I find it odd that my car is not affected by this bc its the same problem of the recall the part of that controls the power steering in the car

NHTSA ODI 11660099

Check Engine Light on, I read the code is P052E, after read some information in internet there is positive crankcase ventilation regulatory valve needs to be replaced. My car is 52000 miles and it seems like happenned to people even with less miles on the cars

NHTSA ODI 11649919

The sunroof locked open during a road trip. I am mechanically inclined, so adding lubricant and driving through a low pressure air front caused the sunroof to shut. Had I been in an emergency, not mechanically inclined, or if this happen during inclement weather or to a little old lady this would have been a severe issue causing the vehicle to become inoperable due to rain or snow entering the cabin and reducing visibility, and damaging the electronic components in the vehicle's cabin. This is also a safety hazard to the the drivers health in conditions of smog, extreme low temperature, animal attack or if there was an assault from a criminal with ill intentions.

NHTSA ODI 11572718

Crankcase Ventilation Valve Emission Modification -Error P052E71 -Error P06DA00

NHTSA ODI 11572383

Had an oil change at a Mercedes dealership after driving for a couple hours. Check engine was on for a code P052E, being crankcase ventilation system. Had the car diagnosed, cost to repair 1,600 dollars. Went through with repair, the code pop up again (P052E). Having to bring vehicle constantly to Mercedes dealerships.

NHTSA ODI 11546064

The small plastic located inside the sliding panoramic sunroof explode and the Panasonic sunroof can be open/close or up/down normally but when I hit close it will stop where the broken pieces was and the roof will automatically move back to the fully open position Dealer said need the rail replaced -2057800175 -2057800275 Motor is broken, need to be replaced , he said after saying the roof can go forward and backward, up and down but can’t close completely. I was gullible to believe what the technician and sale guy said. Technically technician can check the voltage and say it for sure if it is broken. Also, a technician already knew that the sliding rail is damaged. He jumped to the conclusion that motor is broken because of sunburn. I have asked my nephew what he would do in this situation. He innocently said he would replace new sliding rails first and try to run if the “alleged motor “ is really broken. If it is broken, he can just switch to a new motor before testing to confirm it working. He wouldn’t decide to buy a new motor that cost $1,400 extra while the old one might be working properly. Anyway, labor with rails and “motor” cost $3500. Then later I learn I’m not alone. How many affected from this defective parts that Mercedes doesn’t sell it separately. Owner must buy 2 set of rails- a left set and a right set. Cost $1100 total. So since the number of affected are pretty high, a few factory in China and turkey decides to produce these little and sell it online for $15-92, glue and lubricants included. -number of owners struggling to find parts https://mbworld.org/forums/c-class-w205/734208-pano-roof-failure-2.html Parts that Mercedes cannot sell it separately so owners have to buy 2 sets left set and right set rails. “Try words like repair sunroof kit for Mercedes “ on eBay only a few couple thousand people buying it in 2022 alone. https://www.ebay.com/p/28019877104 Motor broken? https://c.xtime.com/tvyUiiMwuwoA2L8JXX#/completePage

NHTSA ODI 11531128

My car had a problem about starting so I went to see a dealership. They got the job done and charged me $320. I just realized that in the invoice they used recall campaign to cover my car. However, they charged me $320 for no reason. Also, I never got any letter regarding to recall. How did they used recall campaign on my car?? And I recently had a sunroof derailed and they used the campaign again but charge me $2700 for it. And of course my car isn’t in their recall list?? I never got a letter as well

NHTSA ODI 11526403

Engine misfire, rough idle, shake when come to red light stop, burnt smell inside cabin, loss of power

NHTSA ODI 11526152

Check engine light appeared this morning, had the code scanned and found it to be P052E. This code is in reference to the Positive Crankcase Ventilation valve, which is responsible for routing excessive crankcase gases. After extensive research online, it would seem this is a known issue for Mercedes once they reach 50,000 miles, right outside of warranty. This is a very costly fix due to it being labor intensive. This should be a recall as it is a known mechanical issue, and even the dealers echo the same.

NHTSA ODI 11507685

I was moving my car from one parking space to another space in front of my house. As I was pulling into the new space, I stopped to check the position of my car. As I lifted my foot off the brake, the car unexpectedly started to lurch forward. When I released the brake pedal, the car suddenly accelerated and proceeded to jump the curb and run into the front of my house. Luckily, no one was injured. There was some damage to the exterior of my house. I have reported this issue to the car manufacturer, Mercedes Benz. In response, they have opened a case to research it further.

NHTSA ODI 11475320

This is a plug-in hybrid car and twice in the last two weeks, the car while in motion on the road, has randomly turned off the engine and lost power. The gas pedal is unresponsive and all the alarms on screen flash and I have to coast to a stop. Most recently it was on a busy road and I barely missed being rear-ended. This is an unsafe situation and has happened twice and the only thing which I can do is come to complete stop, turn off the car and restart it and the problem goes away.

NHTSA ODI 11473539

While driving the check engine light came on. The inside of the car started to smell like gas. A diagnostic check was performed at the Mercedes dealership and it was determined that there were 2 faults: low boost signal & ME control unit this was due to oil leaking from the crankcase vent line through the engine wiring harness and into the ME (engine module).

NHTSA ODI 11468718

The contact owns a 2016 Mercedes-Benz C300. The contact stated that after turning off the vehicle and locking the doors; after a while, the vehicle would independently unlock the doors and then start up without driver input. The vehicle was taken to the dealer however, the mechanic was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 43,000.

NHTSA ODI 11467780

When I go to put my car in reverse, or drive the gear control is malfunctioning and I’m afraid this can be deadly or cause serious injury.

NHTSA ODI 11465794

Mercedes-Benz comes with ECO Start/Stop feature. This feature automatically activates when you start the vehicle and have your seat belt fastened with the door closed. When this function is activated, your vehicle’s engine will shut off when you are at a complete stop, like at a stoplight or in standstill traffic. Once it’s time to start moving again, the vehicle’s engine will automatically restart as soon as you lift your foot off the brake. Randomly experiencing an issue with this feature, vehicle will not restart or it will shutdown in the middle of the road, on the busy road or freeway, it is very unsafe or dangerous. In last two years, we experienced this issue for at least 10 times, at least 5 times vehicle was towed to Mercedes Benz service center in Pleasanton, CA. They replaced the battery, starter, relay but issue still exists and service center also do not have any clue on how to resolve this issue. Reported this issue to Mercedes Benz Customer Support but response has not been favorable. I am not the only one facing this issue, several people reported this issue on online blogs, online channels and discussion boards. Mercedes Benz is ignoring the issue and not serious on addressing it. I request NTSB to investigate this issue, it is risky and dangerous. I personally had couple of close calls with other vehicles rear ending, and I am sure others must have found in this situation. Appreciate your help. Thanks, [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ODI 11444651

The panoramic sunroof does not properly seal to car, allowing the glass to detach and fall from the vehicle during operation and likely to impair the operator during use. Furthermore, without properly sealing the internal cabin is exposed to the environment (i.e. rain, snow, ect.) causing further damage to the internal safety and electrical features.

NHTSA ODI 11418014

SUNROOF WILL NOT OPEN OR CLOSE, THIS IS A MAJOR SAFETY ISSUE! SUNROOF IS CURRENTLY OPEN. ALSO, DEFROST DOES NOT WORK PROPERLY DURING SEVERE WEATHER CONDITIONS. WHEN IT IS RAINING, MY WINDOWS WILL NOT UNFOG, THIS IS DANGEROUS AND MAY CAUSE AN ACCIDENT!

NHTSA ODI 11415642

SUNROOF WILL NOT CLOSE AT ALL, SEATS WILL NOT ADJUST (ELECTRICAL), WIPER VISIBILITY IS UNCLEAR, DEFROST DOESN'T WORK PROPERLY.

NHTSA ODI 11394552

ON FOUR OCCASIONS, THE ELECTRONIC DASHBOARD GOES COMPLETELY BLACK AND WILL STAY THAT WAY FOR QUITE SOMETIME. THE DEALER TOLD ME THAT THE VEHICLE IS 'DOWNLOADING SOFTWARE', BUT THIS HAS HAPPENED ON THE HIGHWAY WITHOUT ANY WARNING FROM M-B. IT HAPPENS AFTER I PARK IT AND THEN RESTARTED IT.

NHTSA ODI 11296803

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.

NHTSA ODI 11185421

WHILE DRIVING DOWN THE 405 FREEWAY VEHICLE LOST POWER STEERING ASSIST AT 65MPH, VEHICLE STEERING WAS VERY HARD TO STEER & STEERING WHEEL LIGHT ILLUMINATED ON THE DASH HAD TO FIGHT WITH THE STEERING TO PULL THE VEHICLE OFF TO THE SIDE OF THE FREEWAY. TRY TO RESTART VEHICLE ALL LIGHT CAME ON NO-START. BATTERY CABLE HAD TO BE REMOVED WAIT 30MIN AND VEHICLE RESTARTED. TOOK THE VEHICLE TO THE DEALER IN BEVERLY HILLS, DEALER DIAGNOSIS AND FOUND SOME DTC'S CODES AND RESET AND RETURN VEHICLE

NHTSA ODI 11164987