2017 MERCEDES-BENZ GLC300 Complaints

I got the P052E error at about 50k miles. Many GLC 300s apparently have this issue. I need a new crank case valve I believe and they put the part in a terrible place. Dealers charging over $1k in just labor.

crankcase ventilation valve replacement required confirmed by the dealer. check engine light came on as notification. It appears to be a very standard problem on the the glc300 when they hit 60,000 miles and are out of warranty. $2000 repair

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving at an undisclosed speed, the front roof panel between the windshield and sunroof detached from the vehicle. The vehicle was not taken to the dealer and was not repaired. The contact became aware of NHTSA Campaign Number: 17V715000 (Visibility) however, the VIN was not included. The manufacturer was made aware of the failure. The approximate failure mileage was 68,000. Warranty on the car has expired and was told consumer would have to pay for it. Rep said she would talk to other people to see what can be done but she is not making any promises.

Was driving on the freeway car started to shake. Speed dropped from 73 to 40 I was thankfully able to merge off the freeway. I stoped to see if there was any visible damage. Everything look normal. Was able to make it home. Husband changed spark plugs and coils. Also bought another small part nothing fixed it. Took it to two different auto shops one being Mercedes. They both confirmed it's a blown engine at 47,000 miles. Unbelievable.

The fuel line leaks directly under the driver seat. Filling the cabin with fuel vapors. Mercedes has an extended warranty for this problem but only on vehicles from 2004 to 2009.

P052E code, Positive Crankcase Ventilation Regulator Valve failed. It is a known issue by Mercedes Benz on its 2016 and newer C-Class and GLC class vehicles. The valve is clearly a manufacturer defect that is burdensome to the consumer as the part is located near the engine mount and prohibitively expensive to fix due to per hour labor rates. Hundreds if not thousands of consumers have been affected through no fault of their own.

driving car and engine failed, #1 piston crack, turbo metal filings ruined it also, very expensive repair. both engine and turbo had to be replaced by mercedes benz service. many others are reporting this also, catastrophic failure at speed possible - not known if any fatalities associates with these engines (on both c300 and glc300 circa 2015 to ~2018)

The steering column has stopped moving up/down. I guess due to some latency build up (after having tried to adjust the steering a few times prior to the drive) caused the steering to move down (one time incident) while driving and caused momentary loss of steering control due to slippage and had to pull over to the shoulder of the freeway. While this was a one time incident it could become a safety issue...this seems to be a rampant issue (up/down movement getting jammed) on all MB vehicles and anything related to critical vehicular controls should be flagged as such.

check engine light appears, car runs fine. the crankcase vent value was broken on our 2017 GLC300 car. a mechanic, with a computer, ran the codes and shared this happens many times to this car. the service advisor at mercedes shared the same input. happens all the time and should be covered under emissions warranty but isn't. this disfunction does not affect driving of car, just emission and (sales pitch to fix it) "could" affect engine in long term. i suspect this is a defective piece in the system that mercedes won't address or cover under emissions warranty.

2017 MERCEDES BENZ GLC 300. CONSUMER WRITES IN REGARDS TO ENGINE MISFIRE, SPARK PLUGS AND CYLINDERS. THE CONSUMER STATED THE ENGINE HAS BEEN REBUILT TWICE BUT, THE FAILURE PERSISTED. THE CHECK ENGINE LIGHT WAS ILLUMINATED.