2016 MERCEDES-BENZ GLC300 Complaints

Crank case vent valve went out. Then turbo went out after that. Car smells of gasoline inside cabin.

check engine light comes one and give code: P052E - Positive Crankcase Ventilation Regulator Valve This is a faulty part that commonly breaks down in all Mercedes GLC 300 and C class. It's part of the emissions system and should be covered under the federal warranty. However, Mercedes won't cover it and charges $3000 for the repair. This is unsafe and unfair practice as they're selling vehicles that they know will break down eventually and could cause harm to their "customers".

At ~40,000 miles my check engine light came on. I took it into the shop for a diagnostic and they informed me that I need to replace the Positive Crankcase ventilation valve/Air Intake Hose. They told me that this is a common issue with this make of Mercedes and that they have done about 4 in just the past few months. Furthermore, they told me that this issue has been fixed on newer models of the same vehicle. This seems like the responsibility of Mercedes to fix this known issue with their car via a recall.

Got a Check Engine Light at 32,400 miles and the code said it was the Positive Crankcase Ventilation Regulatory Valve. It was under warranty, the job requires over 6 hours of labor, and it's due to a intake breather valve getting gummed up with oil/oil vapors/condensation. Well, the check engine light came on again at 58,000 miles and 3 years later. Now not under warranty, the dealer quoted 6 hours and $1435 to do the same repair that was done before. The part is EXTREMELY difficult to get to in order to change, and requires the removal of many engine components, including one of the engine mounts. It seems like this is one of the most common repairs for this series of car. It's been so troublesome, that Mercedes has redesigned the part.

The vehicle engine amber light on, everything else looks like normally. Bring the vehicle to Mercedes dealership to diagnose and fix. After dealership fix, we find out this vehicle maximum speed is 61 during driving on the freeway and it cannot speed over 61. Also, the engine amber light is on again and seatbelt is not working well. We have safety concerns when driving this vehicle on the freeway. Thanks.

Continuous problem with brakes squealing very loud. Have had brake pads replaced and taken to dealership multiple times to no resolution. It is a huge problem with how loud it is not to mention unsafe and making me feel uneasy about them giving out at any time. This is ongoing from several years ago

The contact owns a 2016 Mercedes-Benz GLC300W. The contact stated while driving at 65 mph the vehicle went through a sudden acceleration and then slowed down to about 65 mph. The contact stated no warning lights were illuminated. The contact got off the highway and proceeded to her destination. The contact said she smelled the odor of gasoline while the vehicle was parked. The contact was driving in a parking lot at approximately 5 mph when she lost power to her brakes and the vehicle had another occurrence of sudden acceleration. The vehicle jumped the curb and began to climb up an incline while the contact was attempting to brake. The contact hit a hedge with the vehicle sustaining some front-end scratches. The contact said she suffered some neck pain from the accident but did not seek medical attention. The police were contacted and a report was filed. The vehicle was towed back to the contact's home. The contact called the local dealer where it was towed, the dealer did not diagnose the vehicle. The contact said she also was smelling gasoline from her vehicle at the dealer. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 45,000.

My MB GLC 300 has run out of gas three times. The first two times the car showed it still had 40 miles before fill up and the gas warning light never came on. I took the car in for repair to see if the Fuel level sending unit had stopped working or the float was stuck. The date was March 2020 and at that time the car was under warranty. I was told to make sure I filled up the tank when the fuel indicator reached 100 miles. I was told by the dealer there was nothing wrong and the service department had run a diagnostic. I had never been told that I needed to fill up when a car gauge read 100 miles. Thirty or forty maybe but 100 seemed odd. Two weeks ago I had the gas leak repaired which was the result of the class action law suit. Yesterday I again ran out of gas again. The gas gauge showed 3 bars and 100 miles before next fill up. No gas low warning light came on. I was able to get a friend to bring a gallon of gas so I could drive somewhere to fill up. After I filled the gas tank the gas gauge completely stopped working. The miles to fill up is zero. I have tried resetting the ODM and have checked all the fuses related to the gas tank. This could have been a dangerous situation.

Often after starting the car, inside the car there is a gas smell that we have to closed the vents as it becomes unhealthy until the smell goes away, it last up to 10 minutes. I have taking the car to my mechanic who specializes on Mercedes and could not find any leaks and/or anything wrong. My other issue is that during the raining season when I put my foot on the breaks it makes this loud sound like an airplane landing that I have to release and press and release and press so the car will slow down. My mechanic have done multiple inspections and finds nothing wrong. My third issue is the suspension, driving on freeways at speeds over 55 mph I feel a lot of shaking between front wheels and I can feel every single bump. Again, my mechanic has found nothing wrong that even checked for recalls and has told me that there are no recalls for this vehicle. Obviously there has to be a recall issue and the one more concerning is the gas smell inside the car at start up.

AT 40,000 MILES, ONE OF THE WRIST PINS SNAPPED AND THE PISTON BROKE OFF. THIS CAUSED COMPLETE ENGINE FAILURE AND THE WHOLE ENGINE NEEDS TO BE REPLACED. THIS IS THE SAME PROBLEM THAT CAUSED A RECALL WITH THE 2015 MODEL. THE DEALERSHIP IS MAKING ME PAY FOR THE LABOR, BUT MERCEDES DONATED THE ENGINE (PROBABLY BECAUSE THEY KNOW IT'S THEIR FAULT). SO I'M WONDERING IF THERE SHOULD BE A RECALL ON THIS MODEL AS WELL.