What 138 owners told NHTSA about the 2016 Mercedes-benz Glc-class Hybrid

2016 GLC300 - Fault code P052E71 positive crankcase ventilation regulatory valve displayed on console. I reset code and it came up again in a few days. Plaza Mercedes in St.Louis stated this is a common failure that requires digging deep into the engine. I had valve replaced 15SEP22 costing $1614.36. Invoice is attached.

NHTSA ODI 11510134

Raw fuel smell when vehicle is at idle. Breaks are very loud at low temperatures. Very squeaky like metal on metal yet the brakes are like new from Mercedes dealership.

NHTSA ODI 11504582

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated while driving at various speeds, there was an abnormal fuel odor inside the vehicle. The dealer was notified of the failure and acknowledged that the failure was a known issue with similar-model vehicles. The contact was informed that the fuel line needed to be replaced; however, the dealer could not schedule an immediate appointment. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 15,000. The contact stated that the fuel line was replaced under the vehicle's extended warranty.

NHTSA ODI 11502120

Steering wheel keeps locking up, won’t go up and down. And sometime the steering will just come crashing down on my lap while I’m driving. Did some research and was told by Mercedes dealership that this is a common issue happening with most of their cars.

NHTSA ODI 11501512

P052e positive crankcase ventilation regularly valve

NHTSA ODI 11499654

Check Engine light P052E came on while driving. No collision, normal conditions other than first very cold night of the season. Looked it up and seems to be a common issue with this model.

NHTSA ODI 11499425

Got the MIL obd2 error code P052E - Positive Crankcase Ventilation Regulator Valve Performance. After some research this seems to be a common issue for this vehicle and other similar Mercedes Benz vehicles with the same engine. It is something that it is extremely expensive to fix (2000) and very labor intensive. I believe that Mercedes Benz should recall these vehicles and replace the Intake line due to its constant failure on many vehicles including mine.

NHTSA ODI 11496937

Crankcase ventilation valve issues

NHTSA ODI 11492457

Driving down the expressway at 4 AM when the car had a message and read saying do not change gears alert. I hardly got over to the emergency lane when all systems did not work. The axle , differential and oil pan broke. Had to be towed after waiting 2 1/2 hours for a tow.

NHTSA ODI 11490420

Got the MIL obd2 error code P052E - Positive Crankcase Ventilation Regulator Valve Performance. After some research this seems to be a common issue for this vehicle and other similar Mercedes Benz vehicles with the same engine. It is something that it is extremely expensive to fix (+$1500) and very labor intensive. I believe that Mercedes Benz should recall these vehicles and replace the Intake line due to its constant failure on many vehicles including mine.

NHTSA ODI 11489192

During normal highway driving, the check engine light energized in the display. At the same time, engine power was lost, and the vehicle could no longer accelerate. The Mercedes Benz dealership was less than a mile away, so I went directly there at a slow speed without damaging the engine. Upon inspection, the dealership found that the engine wiring harness was completely engine oil soaked and the oil drained down into the engine control unit (computer), causing loss of one of two turbochargers and loss of engine control and power. It is suspected that the oil originated from one or multiple of the camshaft sensors that are connected to the engine wiring harness. The engine oil traveled through the wiring harness and then completely soaked to engine control unit, which malfunctioned. If this happened while overtaking another vehicle or trying to avoid another, then I would have had a serious accident. I had insufficient engine power to avoid other cars and luckily was in the far-right lane to be able to exit the highway without an accident or damaging my engine due to the higher-than-normal rpms. The vehicle is currently at the dealership and requires a new engine wiring harness which may require removal of the engine to access and replace, a new engine control unit due to being engine oil soaked, and possibly a new turbocharger. This repair could cost well over $10,000 for parts and labor. The vehicle just had its annual maintenance service in September and no oil leak from the engine wiring harness was noted by technicians during the maintenance. The dealership continues to search and localize exactly where the oil originated but believes that either one or multiple camshaft sensors is the cause. The dealership does not know how long it will take to repair the vehicle due to the parts needed and the extent of labor that is required.

NHTSA ODI 11488436

Piston 1 cracked while driving on the highway. My sibling was driving on the highway when the engine suddenly started misfiring and losing power because it lost compression on the piston that cracked. I was lucky enough that I have mechanic experience to replace all the damaged components myself and paid out of pocket. I was super fortunate that the cylinder walls did not get damaged when this happened thus not needing an entire engine replacement which would cost around $10,000 from mercedes. I had to go pick up a trailer from UHaul and go pick up the vehicle from where it broke down. Thinking about this from the perspective of a person who does not have access to rent a trailer, a vehicle to pull said trailer with, or the mechanic experience to fix the vehicle themselves, the cost to get this issue resolved would be much much more than it cost me.

NHTSA ODI 11486871

The vehicle needs a new PCV Valve / hose, as well as a new turbo charger

NHTSA ODI 11484863

On September 7, 2021, I had purchased four new Pirelli Scorpion Verde AS 235/55 R19 SL tires for my 2016 Mercedes-Benz GLC 300, from Discount Tires with warranties on each tire. On September 2, 2022, I taken my vehicle for a routine maintenance at my local Mercedes- Benz dealership and for my annual inspection. I was informed by the dealership that my two back tires were almost bald. In disbelief I inform the tech that I will be taking my vehicle back to Discount Tire since I had just purchased tires less than a year age. On September 6, 2022, I scheduled with Discount Tire and explained with my receipt that I had just purchased these tire less than a year ago. Once a representative from Discount Tire inspected my tires they agreed with the dealership that the two back tires were bad, and I haven't driven over ten thousand miles. So I had inquired about the factory warranty and was informed that there was no mileage for these tires, and they would only give me sixteen percent off for the purchase of new tires. Why would a company like Pirelli sell racing tires to companies which provide consumers that drive daily a race tire. This is certainly deceptive sales practices by both Pirelli and Discount Tire, not fully disclosing this information to the consumer. If an inspection wasn't warranted for the state I reside in I wouldn't of known. This matter needs to be addressed to the Pirelli Company, due consumer safety.

NHTSA ODI 11483340

While driving on the NYS Thruway last week, when I accelerated to pass another car, my engine bucked and kicked followed by the "check engine" light coming on.In very heavy traffic, I was able to pull to the shoulder. I called my service garage and they suggested I not drive the car for safety reasons. When the tow truck arrived, I briefly started the car with the same bucking and kicking from the engine. The car was taken to my regular garage where the "check engine" codes showed issues with the fuel injector and fuel injection system. I was told there is an existing RECALL CAMPAIGN # 2022030003 for the same year, make and model as mine but, my VIN is not part of that RECALL. I would like your help as I do not believe Mercedes-Benz is being fair or equitable in this RECALL. ThankYou

NHTSA ODI 11480844

Engine light came on, test showed P052E error. Crankcase valve needs to be replaced. 60,110 miles. Well maintained, oil changes and services always performed. Properly maintained.

NHTSA ODI 11476611

1)-The crankcase ventilation valve needs to be replaced. This seems to be common problem with these cars. 2)-No safety issues. 3)-Yes many failures as per the internet reports. 4)-Yes- Mercedes 5)-Unknown

NHTSA ODI 11469978

While operating the vehicle at highway speed, the Check Engine Light illuminated on the vehicle dashboard and remained constant. The associated malfunction code(s) displayed were P052E71 (actuator blocked) as well as P06DA00 (electrical-open circuit). The vehicle is available for inspection upon request. The vehicle emitted pungent odor and fumes into the cabin and demonstrated sudden decreased acceleration and rough idling. The problem has yet to be inspected by the manufacturer as it is not sure whether it is safe to operate. No other warning lamps illuminated prior to the failure. Unsure if cold start failure is a symptom associated with current issue or if an electrical problem related to prior recall.

NHTSA ODI 11469757

Faulty crankcase vent valve causing oil to leak into electrical lines of engine with car at 42,000 miles. This was confirmed by dealer. Multiple other Mercedes Benz car owners have had this issue with the crankcase vent valve with simple internet search. Fortunately, the car was taken to dealer before any event occurred but this a safety issue.

NHTSA ODI 11469662

I was unable to put the car in the drive after pulling out parking spaces or any other instance where the car needed to move. When attempting to put in drive, the car would revert to neutral and drift. Leaving me stuck in the middle of the road or parking lots. Check engine light came on briefly after the car wouldn't go in to drive but disappeared. Took it in to dealer immediately and they indicated that the transmission valve body control unit had failed and needed to be replaced. The car has less than 60k miles.

NHTSA ODI 11466465

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

NHTSA ODI 11463663

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".

NHTSA ODI 11461583

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.

NHTSA ODI 11461437

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.

NHTSA ODI 11458836

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.

NHTSA ODI 11458288