2016 Mercedes-Benz GLC-Class Complaint Log

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that while receiving routine maintenance, the mechanic noticed a fuel odor coming from the vehicle. The mechanic determined that the fuel injectors had failed and that the fuel rail needed to be replaced. The mechanic provided the contact with information related to NHTSA Campaign Number: 21V961000 (Fuel System, Gasoline); for the fuel rails and fuel injectors. The mechanic referred the contact to the dealer for assistance. The dealer was informed of the failure and confirmed that the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 60,814.

SUNROOF will not closed , refuse to close on my car

Mercedes-Benz USA (MBUSA) To whom It May Concern, Complaint through your dealer, regional MB and state AG. Going through MBUSA is a waste of time. You would be better off going to Sears and buying a shiny new hammer and banging your head every hour on the hour. A little over a year ago, I Purchase a previously owned 2016 GLC300 from a local DGDG dealership in San Jose CA. for the past few month, I started experiencing a heavy fuel odor generated from the fuel rail and fuel injectors. I initiated a leak detection to verify the above-mentioned defect. I became aware the Mercedes Benz has a major issue with the fuel rail and fuel injectors that caused a safety & emission recall campaign 2022030003 that is launched to replace the fuel rail and fuel injectors on 139 Model Year 2016-2020 that included my car GLC-class vehicle. To my surprise my car VIN number was not listed and flagged in this campaign. According to the campaign issue, a leak may develop between the fuel line and the fuel injectors due to trapped debris from the production process, which could affect the safety and emissions of the vehicle. according to the documents of the campaign, trapped debris might damage the seal between the fuel rail and fuel injectors, which over the life of the vehicle, might result in a fuel leak into the engine compartment. I informed Mercedes Bens that my vehicle fuel rail line and fuel injectors have shown to have a safety manufacture failure. Leaking fuel from this area might contact hot parts of the engine and therefore the risk of fire cannot be ruled out. It seems that the fuel pressure deviation has exceeded the thresholds because the fuel odor is perceptible to me. I had an appointment with Mercedes Benz of Stevens Creek, and they established that my vehicle VIN number was not affected by the recall even though the defects exist on my vehicle. I reached out to Mercedes Benz USA, LLC and filed case # [XXX] but they elected not to take responsibility to repair my ca INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Fuel Rail and fuel injectors Leak contacted Mercedes cooperate to investigate why my car. VIN did not list according to campaign no 2022030003 to replace the fuel Ra and fuel injectors and a Ssfety & Emissios recall campaign that covers 139 Model year 2016-2030 that include my vehicle CLC-Class. My car is experiencing fuel injectors defects but my VIN number was not flagged

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the check engine warning illuminated. The contact stated that the vehicle was taken to the Emissions Center, and the vehicle failed the Emissions test. The vehicle was taken to the dealer to be diagnosed. The dealer retrieved DTC: P052E (PCM has detected an inappropriate degree of pressure from the crankcase pressure sensor). The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.

PVC valve indicator engine light keeps appearing after being replaced twice

Check engine light on-pvc failure. Code PO52E-71as determined by reliable repair shop. Recommended to have vehicle repaired by dealer. Shop advised part is vital to emissions system.

Diagnose: code P05271 - Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction. Mercedes Benz extended warranty to 15 yr / 150k miles for intake assemble which resolve this issue. Like to acquire a confirmation letter from Benz to cover the repair by the Benz dealer

A notice was issued for a common issue with many Mercedes Benz models. https://static.nhtsa.gov/odi/tsbs/2023/MC-10243565-0001.pdf A notice was issued for a common issue with many Mercedes Benz models. [XXX] While the problem is well known, all dealers are reporting the part is in back order without any visibility on when it would be available. This is forcing drivers, including myself to continue to drive the car and potentially creating a big damage to the car. I took the car to Mercedes-Benz of New Rochelle in NY state. I called multiple dealerships in the tri-state are and they all mentioned that the issue was well known without any ETA. Also with a check engine light the car can't pass safety/emission inspection and is not sellable. I bought a new car, can't sell this car and have 0 visibility on when I can get it fixed to sell it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Sunroof. The sunroof is not opening properly. It sounds Ike the window is going to come off of its track. Making a loud noise.

The P052E error has popped up which requires the replacement of the PVC assembly. This is a known issue with these engines and causes the engine to run erratically. Mercedes knows that the issue is common. Please investigate and issue a recall if applicable.

I have noticed extreme gas odors in the cabin of my car, the gas odor is so horrific that even when I exit the car either outside or in my garage the odor remains. My car is housed in my garage and I'm very concerned regarding these fumes which fills up my garage because my home is attached. I researched on a web site that there has been complaints and consequently a recall ( 21V961000) ON 12-12-2021 FOR GLC 300,2016, But my vehicle did not receive a recall notice. I am concerned regarding possible fire or illness related to fumes being inhaled.

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that while driving 45-50 MPH, the engine experienced rough idling and the vehicle was shaking violently. Several unknown warning lights were illuminated. The contact pulled over and turned off the vehicle. The vehicle was towed to an independent mechanic, who determined that cylinder #1 had a cracked piston and the engine needed to be replaced. The vehicle was then towed to another independent mechanic, who also determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 90,000.

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle was taken to the local mechanic who diagnosed that the crank case ventilation sensor was faulty and needed to be replaced. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 70,000.

I lost power on while driving at speed and almost got rear-ended before pulling over. I had to tow the car to a mechanic. After diagnosis it turned out the pistons are cracked and had to be replaced as well as the rod bearings. The pistons have a very abnormal burn pattern and rod bearing wear per my mechanic. This is a beautiful car and I take above average care of it. No car sold in the US should have pistons crack at such a short amount of miles. I believe Mercedes Benz should be held liable for their engineering error.

I am writing to express my deep concern and seek assistance regarding a potentially serious safety issue that I have experienced with my vehicle. I believe that my experience poses a significant risk to both my safety and that of other road users. In June, I encountered a distressing incident when my vehicle's steering wheel locked unexpectedly, leading to a hydroplaning incident that caused my vehicle to veer off the road. Fortunately, there were no injuries, but the situation was undeniably dangerous and alarming. My vehicle displayed a "steering wheel malfunction" message on the screen at the time of the incident. Following this event, I immediately contacted Mercedes Benz to report the issue and seek resolution. Subsequently, on August 1st, my vehicle was taken to a local Mercedes dealership as part of their investigation into the matter. On August 4th, I received a call from the dealership informing me that the inspection had been completed. However, they stated that they were unable to discuss the inspection findings with me directly, emphasizing that any communication regarding the investigation should come from Mercedes Benz USA. Despite my numerous attempts to communicate with Mercedes Benz USA through phone calls and emails, seeking information on the inspection findings and requesting a copy of the inspection report, there was no response or communication from the company. This lack of response and communication from Mercedes Benz left me deeply unsettled. However, I wish to update you that on August 31st, Mercedes Benz USA finally responded to my inquiries. While I appreciate their belated response, the substantial delay in communication further exacerbated my concerns about the safety of my vehicle and the responsibility of the manufacturer. Given the gravity of the incident and the potential risks associated with a steering wheel malfunction, I believe it is imperative that this matter is taken seriously and addressed promptly.

See attached document for complaint

According to NHSTA ID 21V197000 bulletin, my 2016 GLC 300 qualifies for recall related to sunroof safety matter. My sunroof is loose and dealer said since your organization didn’t include my VIN for this recall, they will not address it. Can you please add my VIN. I’m experiencing exactly as described in your recall bulletin. Thank you!

What component or system failed or malfunctioned, and is it available for inspection upon request? Crank case vent valve malfunctioned 2 years ago and was replaced. Now it is failing again. Reports online from other owners show this part failing about every 2 years / 20k miles. This is not a wear item. Yes it is in my car How was your safety or the safety of others put at risk? It is part of the fuel system so it can potentially damage the car Has the problem been reproduced or confirmed by a dealer or independent service center? Yes Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? It has been inspected by the dealer Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There is a check engine light that appears right at failure, not before.

While driving my car, I tried to open the Panamatic sun roof to get air. As I pushed the button to open the sun roof, it opened a crack on the the driver side and the other side of the sun roof stayed closed. At this point I heard a crashing assembly noise and the whole sun roof got stuck uneven and crooked. Driving on highway, I was shocked and felt in danger getting to an automobile accident and getting hit by other cars or any loose parts hitting them. Getting myself together, I pulled over and got out of the highway. I parked and tried to understand what happened. I tried to close the partially opened on one side glass roof with no avail. It was totally stuck. I parked my car and went home. A day after the incident, I had the car towed to an authorized repair shop for investigation and repair. It took two days to repair and replace all of the roof railing assemblies. A copy of the invoice is enclosed. It was a very dangerous and traumatic experience for me and I truly felt in this incident, I could have hurt other people or got myself in a bad accident.

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.

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.

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.

P052e positive crankcase ventilation regularly valve

When driving the car, the engine began to violently shake and fail. The engine ended up having a piston failure due to a small wrist pin and needed the entire engine block replaced. I was lucky that I was not on the freeway or in a more dangerous spot when the engine failed while driving.

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.

Crankcase ventilation valve issues

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.

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.

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

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.

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.

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

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.

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.

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

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.

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.

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.

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

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.

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.

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".

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.

I own a 2016 Mercedes Benz GLC 300 and I’ve noticed that a strong gas smell when I start the car during cold weather. You notice the smell outside and inside the cabin as well as it comes in through the vents.

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.

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.

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.