There are 5 owner-reported brakes complaints for the 2023 Mercedes-Benz GLC-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
See attached document for complaint.
First of all, this is a new car produced in 2023. Since I bought it, the engine has shown alarms more than four times. Every time I went to the 4S shop, no problems were found. Today, the engine still shows a yellow alarm. Secondly, the brake disc makes a loud noise when I park the car and then start the accelerator. Mercedes-Benz has not paid attention to these problems. I think it greatly affects driving safety.This car has been sent to the 4S store many times, but the inspection has always failed. The above-mentioned problems with the car have always existed. I sincerely request your help in solving them.
On [XXX], I was driving at 45MPH on a two-lane state road. There was no traffic within 1/4 -1/2 mile of me on that road. There were no guardrails and the road was clear - no birds, animals, people, or construction. For no reason, the car beeped twice and automatically slammed on the brakes so forceful that everything on a seat landed on the floor. Had there been a vehicle behind me, they would have almost certainly slammed into me. This is my second safety report with this vehicle, the previously reported lane keeping assist still allows me to depart my lane with no correction or indication by the system, the dashboard indicators remain green if I depart my lane without a turn signal. It has been in 5 times for this and Mercedes closed the case. They say it's fine. Lemon law attorneys in my state refuse to take cases with Mercedes so I am stuck with a vehicle that should not be allowed on US roads, can't lemon law it and can't sell it or trade it in with a clear conscience. There is a laundry list of other problems as I drive more than 25,000 miles a year but I only report those which could get myself or others killed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Purchased vehicle 6-23 from MB West Chester pa. Feb 3-24 I was parked in a lot once I tried to enter the car I was locked out of the vehicle completely 2270 miles on it. I tried to use the key no avail. I had to contact Mercedes to have my car towed to the shop. Once arrived the damage signal came on. I was told taking the car off the tow truck sometimes makes that signal come on. I never understood. Rep stated it was the battery that died. Which the tow truck guy stated it had to be electrical. Then I returned the vehicle due to loud noise from the front of my vehicle rep stated he didn’t hear it. Then I had to return the vehicle due to brakes squealing very loud. At 5000-7900 miles I was told I needed brakes all around my vehicle. No warranty was applied I paid cash. Left the shop and the noise from the front continued and the squealing from the brakes was still very loud. I brought it back to the shop for treatment care. The rep stated it was a leaf in the front of my engine and he put some special oil on the brakes to stop the squealing but to no avail. The noise continued in both places. I brought the car back for my second treatment and then I was told they hear the noise in the front. They kept the car for a couple of days called me and stated the head dash board was burnt out. The same complaint I was making light flashing and noise. I went to pick the vehicle up stated my warranty had to cover almost $11,000 worth of work. I was devastated, depressed and then I asked is the car safe for me to drive the rep said yes. I was afraid but I had to take my car and leave. I left with tears in my eyes. I could not believe I saved my last of savings to buy me a reliable, dependable Luxury car due to my severe medical issues to make me feel better. I am very disappointed, confused, devastated and very saddened about my brand new vehicle I purchased for myself. I contacted the Attorney General back in Feb 24 and I contacted the lemon Law for support.
The contact owns a 2023 Mercedes-Benz GLC300 4Matic. The contact stated that while driving at various speeds and coming to a stop, the vehicle skidded or slid and felt like it had been rear-ended. There was no warning light illuminated. The vehicle was taken to the dealer, but the failure could not be duplicated. The contact stated that the infotainment system was inoperable intermittently. Additionally, the contact stated that while driving 40-50 MPH and depressing the accelerator pedal, the vehicle failed to respond. The contact merged to the right lane to be able to pull over as necessary. There was no warning light illuminated. The vehicle was taken to the dealer to be diagnosed, but the cause of the failure could not be determined. The contact stated that the failure had recurred intermittently. The vehicle was taken back to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was unknown.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026