2023 Mercedes-Benz GLC 300 problems & reliability
55 owner complaints filed with NHTSA for the 2023 Mercedes-Benz GLC 300, alongside 12 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
2 complaints report injuries (2 injured, 1 deaths reported).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System → | 30 | 55% |
| Engine → | 15 | 27% |
| Exterior Lighting → | 10 | 18% |
| Unknown OR Other | 8 | 15% |
| Forward Collision Avoidance | 7 | 13% |
| Lane Departure | 6 | 11% |
| Fuel/propulsion System | 5 | 9% |
| Service Brakes | 5 | 9% |
| Structure | 4 | 7% |
| Power Train | 3 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Complaints by incident year
What owners report
“The contact owns a 2023 Mercedes-Benz GLC300. The contact stated that while driving at an undisclosed speed, the speed limit warning system failed to function as intended. The contact stated that while driving 60 MPH, the Heads-up Display (HUD) illuminated a red light and an unknown message about driving too slowly…”
Electrical System · filed Mar 19, 2026
“There are two issues 1) Unsure of the exact date, but about a year or two ago we were driving our car and the car's automatic break system went into effect on a typically busy, 3 lane road despite there not being any cars in front of our vehicle. We took it into the dealership, who confirmed the issue and told us that…”
Electrical System · filed Mar 18, 2026
“I purchased a brand new GLC 300 on May 25, 2023. By June 2, 2023 I was already stranded due to a 12V battery electrical system failure. Since then I have been stranded 8 total times and the vehicle has been in the service department 14+ times for repeated electrical issues (8 of those visits were related to the same…”
Electrical System · filed Mar 5, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Malfunction Indicator Light / No-Start
Defect Petition DP23003 · opened Jul 25, 2023 · closed May 20, 2024
Technical service bulletins
313 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2023 Mercedes-Benz GLC 300. The 10 most recent:
This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below. In our continuing efforts to ensure the proper performance of Mercedes-Benz…
EW - DMTL · Warranty Program/Extension · issued Jul 31, 2026
Complaint After an "Over the Air" update (OTA), FM or SDARS radio reception is limited; only a few stations are found. Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia…
LI82.60-P-080806 · Service Bulletin/Repair Instructions · issued Jul 17, 2026
Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause…
LI35.30-P-058566 · Service Bulletin/Repair Instructions · issued Jul 14, 2026
Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("- -"). • Flashing when…
LI54.71-P-079104 · Service Bulletin/Repair Instructions · issued Jul 9, 2026
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Jul 8, 2026
Complaint Radio station cover art does not refresh when switching stations. The UI continues to show the old station’s artwork instead of updating to the new one. Cause When a new station change request is triggered, a…
LI82.60-P-080383 · Service Bulletin/Repair Instructions · issued Jul 8, 2026
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Jul 7, 2026
We are experiencing intermittent issues when flashing A26/17 - MBUX multimedia system + Instrument cluster (Head unit) when using flashing method ethernet to USB-C. Until further notice, please flash via VCI only.
ANN Interm. Issues Flash · Other · issued Jul 2, 2026
Complaint 1. "Perform vehicle handover" in the workshop menu to start the maintenance computer for service A/B cannot be carried out. 2. Service confirmation is not possible because "Perform vehicle handover" is…
LI00.20-P-077615 · Service Bulletin/Repair Instructions · issued Jul 1, 2026
Complaint General information on the operation of the PRE-SAFE® Impulse system: The PRE-SAFE® Side Impulse system is a preventive, i.e. pre-collision occupant protection system. The task of the system is to provide…
LI54.30-P-080649 · Service Bulletin/Repair Instructions · issued Jul 1, 2026
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2023 Mercedes-Benz GLC 300 has 12 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2023 Mercedes-Benz GLC 300?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.