Crankcase Ventilation Valve Emission Modification -Error P052E71 -Error P06DA00

- Hayward , CA, USA

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.

- Mt.Sterling, KY, USA

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

- Sherman Oaks, CA, USA

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

- Sherman Oaks, CA, USA

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.

- Carmel, IN, USA

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.

- Baltimore, MD, USA

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).

- Maumelle, AR, USA

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.

- San Diego, CA, USA

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).

- Pleasanton, CA, USA

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!

- Norcross, GA, USA

Sunroof will not close at all, seats will not adjust (electrical), wiper visibility is unclear, defrost doesn't work properly.

- Norcross, GA, USA

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.

- Baltimore, MD, USA

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.

- Celebration, FL, USA

My car has a safety risk open recall since February 08, 2017 that has not been fixed. I have not been contacted by an authorized Mercedes Benz dealer to take my car in and remedy the safety recall. The recall notice states summary: Daimler ag (dag), the manufacturer of Mercedes-Benz vehicles, has decided that on certain C-class (205 platform), E-class (213 platform) and glc (253 platform) vehicles, the starting current limiter could be overloaded under certain conditions during the starting procedure. In the event the starter is blocked due to engine/transmission damage (e.g. hydro locked engine), a very high electric current would flow through the starting current limiter during the subsequent start attempt. Should the driver attempt to start the engine repeatedly despite the engine not cranking, the very high electric current draw might lead to overheating of the starting current limiter. In a worst case, surrounding components might melt, and potentially ignite and lead to a fire. Safety risk: In the event the starter is blocked due to engine/transmission damage (e.g. hydro locked engine), a very high electric current would flow through the starting current limiter during the subsequent start attempt. Should the driver attempt to start the engine repeatedly despite the engine not cranking, the very high electric current draw might lead to overheating of the starting current limiter. In a worst case, surrounding components might melt, and potentially ignite and lead to a fire. Remedy: An authorized Mercedes-Benz dealer will retrofit a fuse on the starting current limiter on the affected vehicles. Recall status: Recall incomplete

- San Antonio, TX, USA

Takata recall NHTSA recall number 17V114 : purchase the vehicle on December of 2016, we got a recall letter in March of 2017 letting us know of the recall but was notify that the part is not available for repair till August of 2017. On August 05 the car caught on fire in the middle of the street due to recall part.

- Slidell, LA, USA

The contact owns a 2016 Mercedes Benz C300. The contact stated that while driving in inclement weather, the vehicle became stranded in high standing water and stalled. The contact stated that her siblings were able to push the vehicle out of the high standing water. The contact stated that after three attempts to restart the vehicle, the contact noticed smoke billowing from beneath the dashboard. The vehicle became engulfed in flames. The fire department was notified and was able to extinguish the fire. A fire report was filed. No injuries were sustained in the fire. Mercedes roadside assistance was contacted but failed to show up. The vehicle was first impounded and then towed to Mercedes Benz of cutler bay located at: 10701 sw 211 St, cutler bay, fl 33189, (305) 251-0345. The vehicle was not diagnosed. The vehicle was not repaired. The vehicle was included in NHTSA campaign number: 17V114000 (electrical system, engine and engine cooling). The manufacturer was contacted and notified of the failure. The approximate failure mileage was 10,000. The contact stated that the vehicle had not yet been confirmed as a total loss.

- Miami, FL, USA

The contact owns a 2016 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 17V114000 (electrical system, engine and engine cooling). The parts to do the repair were unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer (atlanta classic cars Mercedes-Benz located at 1705 boggs rd nw, duluth, ga 30096; (770) 279-3600) was called and the contact left a voice message. The manufacturer was not contacted. The contact had not experienced a failure. VIN tool confirms parts not available.

- Stone Mountain, GA, USA

The contact owns a 2016 Mercedes-Benz C300. When the contact attempted to drive the vehicle, the push start button failed to start the vehicle. The vehicle was taken to the dealer (West palm beach Mercedes-Benz located on 4000 okeechobee, West palm beach, fl). The contact was informed that the correct key was not used to start the vehicle. The vehicle could not be serviced because the part for the repair was unavailable. The vehicle was not repaired. The contact received notification of NHTSA campaign number: 17V114000 (electrical system, engine and engine cooling). The part needed for the repair was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The approximate failure mileage was 11,000. VIN tool confirms parts not available.

- Lake Worth, FL, USA

The contact owns a 2016 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 17V114000 (electrical system, engine and engine cooling). The part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The local dealer, Mercedes Benz of fort Washington 404 Pennsylvania avenue fort Washington, pa 19034, was contacted and informed the contact that they had not heard of the recall previously. The manufacturer was not made aware of the issue due to a constant hold time applied to the calls. The contact had not experienced a failure. VIN tool confirms parts not available. The consumer stated the he wanted to withdraw his complaint. Updated 09/20/2017

- Rose Valley, PA, USA

The contact owns a 2016 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 17V114000 (engine and engine cooling, electrical system). The part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. A dealer was contacted and stated that the parts were not available. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

- Cary, NC, USA