2017 Mercedes-Benz GLC 300 Owner Complaints

I smell gas in my car. There is a recall for the fuel parts on the 2019. I have a 2017 with the same issue.

NHTSA ID

11715888

Incident

Feb 5, 2026

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the messages "Driver’s Air Bag Malfunction - Service Required" and "Collision Prevention Assist Unavailable" were displayed. The vehicle was taken to an independent mechanic who diagnosed and determined that the air bag had malfunctioned. The vehicle was not repaired. The contact called the dealer, but the vehicle was not inspected or repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 130,000.

NHTSA ID

11715404

Incident

Nov 3, 2025

Mileage

130,000 mi

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while parked and attempting to release the seat belt, the seat belt remained latched. The contact stated that after the third attempt, the seat belt operated as needed. The failure had occurred in the front driver’s and passenger’s side seat belts. The vehicle was taken to a dealer, where it was determined that the buckle and needed to be replaced. The seat belt buckle was replaced, and the vehicle was repaired. The manufacturer was notified of the failure but offered no assistance because the warranty had expired. The approximate failure mileage was 71,000.

NHTSA ID

11715340

Incident

Dec 15, 2025

Mileage

71,000 mi

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving approximately 30 MPH, the first panel of the panoramic sunroof went off track and failed to close as intended. The contact stated that while inspecting the vehicle, the panoramic sunroof glass was pushed down firmly, and the sunroof closed. The contact attempted to open the sunroof, but the sunroof failed to operate as intended; however, the contact heard a motorized sound coming from the sunroof. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 70,000.

NHTSA ID

11698964

Incident

Nov 15, 2024

Mileage

70,000 mi

The Valve body control failed. I took the car into the dealership but upon doing some searching this seems to be a common issue amongst owners of this vehicle/make model. The transmission won't go beyond 5th gear (of 9) so it's is dangerous to drive on the interstate. The car doesn't shift into drive, only shifts into N, the reverts automatically to park. It required the engine shutting on/off multiple times and only then does it go into 3rd gear, causing the vehicle to jump due to missing gears. This issue could leave an owner stranded at any time and cause injury due to the limitations of the gears. It was inspected and confirmed behavior by Mercedes in Durham NC. There were no warning lamps, there were no signs of the issue. The technician did plug it in and was able to read the fault codes but it didn't trigger a light. The appeared first about 45 days ago, and the vehicle was taken in to be looked at 7/21/25.

NHTSA ID

11680130

Incident

Jun 27, 2025

My vehicle goes into neutral while driving which poses a major risk.

NHTSA ID

11669974

Incident

Jun 28, 2025

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that on several occasions while opening the sunroof, the contact heard an abnormal grinding sound. Additionally, the contact stated that the sunroof failed to close as intended. The vehicle was taken to a dealer where it was diagnosed and determined that the sunroof rails needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 82,000.

NHTSA ID

11667611

Incident

May 31, 2023

Mileage

82,000 mi

Vehicle has previous recalls done and still has the same issues with recall. Srs code no air bag will deploy. Dealer ship refused to service vehicle due to miscommunication and I'm driving a defective vehicle without an airbag which could lead to a bad accident waiting to happened. I will like to file a complaint against Mercedes of Richmond for refusing to service my vehicle without a defective air bag and the passenger seat bear latch doesn't retract properly. So I'm currently dealing with 2 huge safety hazard and was denied service due to a miscommunication with Steven Powers (service technician) at Mercedes of Richmond! I will like an investigation done.

NHTSA ID

11666296

Incident

Jun 10, 2025

No incident my vehicle has a front left malfunction service required light and issues with the passenger seatbelt not proper latching. Upon checking I notice my car had previous recalls done. It seems as if the same issues has come about. NHTSA: 18v177- seat belt not retracting properly. NHTSA: 17V627 is related to the steering column switch replacement of clock spring. So if me or a family member was to get into an accident no airbag will deploy! Huge safety hazard!

NHTSA ID

11664823

Incident

Mar 1, 2025

The driver mirror and passenger mirror are warping or having some type of melting effect happening to it.

NHTSA ID

11664500

Incident

May 30, 2025

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving on several occasions at various speeds, the front passenger’s side seat belt retractor failed to extend or retract as intended and became stuck. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. Additionally, the contact stated that on several occasions while started and running, the message “Service Soon” was displayed. The vehicle was taken to a dealer where it was diagnosed and determined that the clock spring needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 120,000.

NHTSA ID

11664416

Incident

Sep 15, 2024

Mileage

120,000 mi

-The malfunctioned component is the Positive Crankcase Ventilation. - Vehicle wanted to stall and did not want to accelerate while in the middle lane on the highway with my family. - Yes it has been diagnosis by certified mechanic - The check engine light turned on at the time of the incident and has been turning on and off ever since.

NHTSA ID

11654950

Incident

Mar 24, 2025

I was driving and my engine light came on. I ran the code and it came up as P052E which has to do with the positive crankcase ventilation regulator valve. I’ve heard that this part goes out very often on the Mercedes Benz.

NHTSA ID

11651403

Incident

Mar 24, 2025

Car stalled in traffic due to code P052E PCV regulator valve

NHTSA ID

11649075

Incident

Mar 18, 2025

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while operating the vehicle, the fuel gauge provided incorrect information and indicated that there was no fuel in the fuel tank. The contact stated that the failure was intermittent and sometimes occurred immediately after refueling. The vehicle was taken to the local dealer who diagnosed the vehicle and determined that the fuel tank needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 55,000. The VIN was not available.

NHTSA ID

11637735

Incident

Jan 22, 2023

Mileage

55,000 mi

Strong gasoline smell coming from the engine bay every morning at start up. I removed protective plastic lining from the under carriage to identify the issue. I identified a lot of gasoline dripping from the top portion of the engine compartment where the High Pressure Fuel Pump is located. There was no warning or check engine lights that alerted of this issue of a gasoline leak. This is very dangerous as it could cause the vehicle to catch fire.

NHTSA ID

11631359

Incident

Dec 18, 2024

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken back to the dealer and the contact was informed that the vehicle was repaired. The contact stated that the dealer had only reset the codes. In addition, the contact stated that the tire pressure sensor warning light was illuminated. The contact stated that the sunroof latch failed to close as needed using the sunroof power switch. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 88,100.

NHTSA ID

11626697

Incident

Oct 21, 2024

Mileage

88,100 mi

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed positive crank valve. The contact was informed that the positive crank valve needed to be replaced. In addition, the contact was informed that the repair was covered under an extended warranty program, however, the parts were on backorder. The vehicle was not repaired. The contact stated that the failure began in December 2023, however the warranty repair was completed in September 2024, due to parts being on back order. The vehicle was repaired, however, the failure reoccurred. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the contact heard a loud boom that came from the engine. The vehicle was taken to the dealer where it was diagnosed with a blocked turbo. The contact was informed that the turbo needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 94,000.

NHTSA ID

11619914

Incident

Dec 16, 2023

Mileage

94,000 mi

I previously submitted a problem My #11606217 I found out that these tires (2nd set replacement due to tread low within 7 months) I am very concerned that due to the DOT # on these tire is 0119 (last four) which is 5 years old I do not feel safe to travel on tires that is 5 yeas old The original purchase was January 2024. They were replaced (due to tread worn) with these tires August 2024 What is the timeframe for tires purchased I purchased 2 tires previously (front) from the Mercedes dealer 2 years ago and the DOT# is 4622 Please let me know if these tires are safe for long distance

NHTSA ID

11613337

Incident

Aug 2, 2024

On [XXX], I purchased 2 Brand New Tires for my vehicle from (Howie's Tires (No. Miami Fl) This company is a DBA Walter James Investments LLC These tires was to be placed on the rear and moved the rear tire (Mercedes) to the front On [XXX], the passenger front tire (Mercedes) blow out due to a nail I was towed along with my vehicle to Howie's to purchased another tire to replace the passenger front. I have always purchased my tires from Mercedes-Benz (Ft Lauderdale, FL) I was told by a mechanic (July 31, 2024) that I would soon need rear tires due to the tread was very low These tires were not 7 months old. I DONT UNDERSTAND I contacted Renzo at Howie's I went in on August 1, 2024 to let them see this. He said also said the tread was low. Another guy (maybe the manager) came out. He started telling me the those were not their tire also I had them rotated. He wanted me to pay for a another tire and he give me one. I said no to his accusations. Today, August 2, 2024, I had these tire installed. I asked them was their a DOT number that should be on my receipt he said no to both times. I was told there is and I will like you to look into this for me. Well after a lot of going back and forth he agreed to replace them I submit this form to find out if the tires that was replaced (for purchased January 24)and the passenger front tire (purchased? is indeed brand new Run Flat tires Please let me know the DOT number Thanks so much INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11606217

Incident

Jan 24, 2024

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle was able to be restarted. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the battery. The vehicle was repaired, but the failure reoccurred. The vehicle was taken to the dealer, who then diagnosed a failure with the alternator. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

NHTSA ID

11595688

Incident

Jun 21, 2024

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while at a stop light, the vehicle independently shifted to neutral(N) for approximately 5 minutes. The vehicle failed to release from neutral when the driver shifted the gear shifter. The contact stated that the transmission then released from neutral(N), and the vehicle jolted forward. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 75,000.

NHTSA ID

11595449

Incident

Jun 8, 2024

Mileage

75,000 mi

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that she detected an abnormally strong fuel odor after parking the vehicle, and while starting the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.

NHTSA ID

11590367

Incident

Mar 1, 2024

Mileage

70,000 mi

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving at an undisclosed speed, the windshield wiper blades detached. The contact stated that the vehicle was purchased new in 2017. The contact stated that whenever it rained and the wipers were activated, the wiper blades would detach and flop over the front windshield. The contact stated that the vehicle had been taken to the dealer several times and the wiper blades had been replaced several times; however, the failure was persistent. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 500.

NHTSA ID

11578068

Incident

Jul 18, 2017

Mileage

500 mi

Error message of collision prevention assist inoperable. Mercedes dealer wants $400 to look at it only.

NHTSA ID

11577867

Incident

Mar 11, 2024