SUV, gasoline, built in Germany. Owner complaints on file from Apr 1, 2016 to Aug 21, 2026.
Owner complaints about this model year, by the year they were filed with NHTSA.
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
| Campaign | Filed | Subject | Component | Vehicles | Remedy |
|---|---|---|---|---|---|
| 23V-854 | Dec 15, 2023 | Front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair,… | Structure | 2,976 | Part replacement |
| 21V-197 | Mar 19, 2021 | Front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair | Structure | 15,096 | Repair or modification |
| 21V-058 | Feb 5, 2021 | Software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the… | Communication | 1,292,258 | Software update |
| 19V-787 | Nov 1, 2019 | For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V787-4620.pdf | Communication | 24,226 | Software update |
| 18V-683 | Oct 1, 2018 | Seat belt latch plates (the parts that insert into the buckles) for the outboard rear seats may retract into the interior paneling, preventing the… | Seat belts | 4,702 | Repair or modification |
| 18V-177 | Mar 15, 2018 | Seat belt latch plates (the parts that insert into the buckles) for the outboard rear seats may retract into the interior paneling, preventing the… | Seat belts | 121,858 | Repair or modification |
| 17V-819 | Dec 18, 2017 | These vehicles may have misadjusted headlights, possibly resulting in the low beam headlights insufficiently illuminating the roadway | Lighting | 8,134 | Repair or modification |
| 17V-627 | Oct 6, 2017 | Driver's air bag may unexpectedly deploy due to insufficient grounding of the steering components if an electrostatic discharge occurs and the air… | Airbags | 495,290 | Not stated |
| 17V-177 | Mar 14, 2017 | Various control units on these vehicles may have been updated with incorrect software, potentially affecting the correct deployment of the air… | Airbags | 51 | Software update |
| 17V-114 | Feb 23, 2017 | In the event that the engine or transmission cannot turn over, the starting current limiter may overheat from the repeated attempts of the starter… | Electrical system | 307,629 | Repair or modification |
| 16V-603 | Aug 16, 2016 | Affected vehicles may be equipped with an Electronic Stability Program (ESP) control unit that may have been damaged before being installed | Stability and traction control | 62 | Part replacement |
| 16V-146 | Mar 10, 2016 | Steering columns in the affected vehicles may have the wiring harness for the switch module incorrectly routed | Electrical system | 888 | Part replacement |
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
133 complaints on file, page 1 of 7.
On XXX, my 2016 Mercedes-Benz GLC 300 was serviced at a Mercedes-Benz dealership for a B Service, including replacement of the rear brake pads and sensor. The rear wheel had to be removed to perform this work. On XXX, approximately 7 days later, my wife was driving the vehicle with our [XXX] son and his friend as passengers when the LEFT REAR WHEEL COMPLETELY SEPARATED from the vehicle while in motion on a public road. A truck was approaching from behind. The family narrowly avoided a serious collision. Police responded to the scene and an officer directed traffic while the vehicle was towed. The lug bolts were recovered from the roadway. The dealership's General Manager later asked me to return the lug bolts, which I did. The vehicle required repair of the wheel and hub assembly at a collision center. I was given no written explanation of why the wheel separated. Separately, after the XXX service I noticed a transmission problem that was not present before. On XXX it became dangerous: coming out of stops at traffic lights and stop signs, the transmission would slip into Neutral instead of engaging Drive, and after several attempts would drop directly into third gear with a hard jerk. This creates a serious risk of being unable to accelerate away from a stop in traffic. I documented this on video and provided it to the dealership. No injuries have occurred, but both incidents were near-misses with a high risk of a crash or injury. I am reporting this so the potential defect and the quality of the safety-related service are on record. I have photographs and video from the wheel-separation scene, the transmission video, the service records, and related documentation available on request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint 11758634Was driving down the highway a the panel between the windshield and panoramic sunroof detached a flew off. Other models are included in this same recall but my make and model are not
NHTSA complaint 11747561The steering tilt motor is stripped and will not move up or down and is stuck in the full "UP" position. Unable to adjust for the driving position.
NHTSA complaint 11735596SUNROOF will not closed , refuse to close on my car
NHTSA complaint 11696259The 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.
NHTSA complaint 11694113Mercedes-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 I
NHTSA complaint 11688647Fuel 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
NHTSA complaint 11659257The 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.
NHTSA complaint 11635618The 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.
NHTSA complaint 11617878PVC valve indicator engine light keeps appearing after being replaced twice
NHTSA complaint 11614600Check 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.
NHTSA complaint 11614470The 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.
NHTSA complaint 11606449When 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.
NHTSA complaint 11606306Diagnose: 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
NHTSA complaint 11591965Sunroof. The sunroof is not opening properly. It sounds Ike the window is going to come off of its track. Making a loud noise.
NHTSA complaint 11587031A 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)
NHTSA complaint 11586617See attached document for complaint
NHTSA complaint 11557612I 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.
NHTSA complaint 11556614According 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!
NHTSA complaint 11554552The 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.
NHTSA complaint 11553798Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.