2024 Mercedes-Benz GLC 300 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
21 owner complaints analyzed
8 distinct recall campaigns
2,174 mi median reported failure mileage
Scope: 2024 model year. Data snapshot: . 3 complaints include usable failure mileage.
Most common problems
Engine is the most frequently named component, appearing in 7 of 21 complaints (33.3%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 6 | 28.6% |
| Electrical and battery issues | 6 | 28.6% |
| Transmission and shifting | 3 | 14.3% |
| Steering behavior | 2 | 9.5% |
| Engine operation | 1 | 4.8% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine | 7 |
| Electrical System | 5 |
| Power Train | 5 |
| Exterior Lighting | 3 |
| Service Brakes | 3 |
| Unknown Or Other | 3 |
| Forward Collision Avoidance: Automatic Emergency Braking | 2 |
| Air Bags | 1 |
Engine: 7; Electrical System: 5; Power Train: 5; Exterior Lighting: 3; Service Brakes: 3; Unknown Or Other: 3; Forward Collision Avoidance: Automatic Emergency Braking: 2; Air Bags: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 2 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 1 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 2; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 1; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (2). 18 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2023 | 1 |
| 2024 | 14 |
| 2025 | 3 |
| 2026 | 3 |
2023: 1; 2024: 14; 2025: 3; 2026: 3
Pattern summary
Engine leads the component reports. Braking behavior appears in 6 complaint narratives. Electrical and battery issues appears in 6 complaint narratives. Transmission and shifting appears in 3 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11555404 · 2023-11-16 (November 16, 2023)
After giving a pressure to the brakes, the car feels like the brakes are being slipped towards the end, so I have to hold the brakes hard at the end. I have tried different models of Mercedes such as E class but the brake of E class works exactly opposite from GLC 300. When I give a pressure to E class, first it will stop slowly and towards the end, it will stop more aggressively. When I drive GLC 300 on highway, I had to make several sudden stops because I couldn't estimate the brake range. I made several different people to drive my car, and …
Owner-reported narrative. Look up ODI 11555404 at NHTSA ↗
Owner report 11604088 · 2024-07-23 (July 23, 2024)
The contact owns a 2024 Mercedes Benz GLC 300. The contact stated that while attempting to park, the vehicle experienced unintended acceleration causing the contact to lose control of the vehicle and crash into a wall, another vehicle, and two poles where it came to stop when crashing into the second pole. During the unintended acceleration, the contact depressed the brake pedal to control the vehicle however it failed to respond. No air bags deployed. The contact sustained chest, neck, and back injuries and an ambulance transported her to a h…
Owner-reported narrative. 97,000 miles reported. Look up ODI 11604088 at NHTSA ↗
Owner report 11566165 · 2024-01-17 (January 17, 2024)
Brand new '24 GLC300 4MATIC. Engine light came on with no error message. Brought it in for service. Miscellaneous engine repair states: "Found current code POA7F00 in drivetrain control unit. Followed LI54.10-P-077250. Cleared codes. Drained 48V battery to below 25% SOC. Charged vehicle to 70% SOC. Job complete." Service foreman mentioned that the service performed may not resolve issue. He contacted Mercedes-Benz Engineering and said no fix at this time and no ETA. Left service with no more engine light on. However, it didn't take…
Owner-reported narrative. Look up ODI 11566165 at NHTSA ↗
Owner report 11566466 · 2024-01-19 (January 19, 2024)
The contact owns a 2024 Mercedes-Benz GLC300. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The vehicle was taken to a dealer and the contact was informed that the 48V bolt battery had caused the check engine warning light to illuminate. The contact was informed by the dealer that the temporary fix would be to reduce the battery charge to 25% then charge the battery to 75%. The check engine warning light returned soon after the fix and the contact was informed that there was no permanent fix for …
Owner-reported narrative. 1,800 miles reported. Look up ODI 11566466 at NHTSA ↗
Owner report 11625278 · 2024-11-14 (November 14, 2024)
When stopped at a light or stop sign, Vehicle will Jerk forward as If hit from behind. Very surprising and dangerous. Very intermittent. The has happened many times. Vehicle will at times have rough downshifts. Ie. overdrive (9th) to (8th) gear. also intermittent. This has happened multiple times. Vehicle was taken to the dealer twice for a total of 50 hours in the shop. The first service time no problem was found, diagnostics did not show problem. Aug 22 to Aug 30, 2024. The second service time Oct 3 to Nov 14, 2024. Problem was dup…
Owner-reported narrative. Look up ODI 11625278 at NHTSA ↗
Owner report 11647082 · 2025-03-07 (March 7, 2025)
I am writing to report a critical safety issue with my 2024 Mercedes-Benz GLC300, VIN: [XXX] , which I purchased on [XXX], from Mercedes-Benz of Walnut Creek, CA, with 9,500 miles. On [XXX], while driving on [XXX], the vehicle suddenly lost power, the transmission downshifted to 2nd gear, and the accelerator became unresponsive. I was forced to drive at 20 mph for 20 minutes on a busy freeway, posing a severe risk of a rear-end collision. I managed to exit the freeway, but this incident could have resulted in a serious accident. This failure …
Owner-reported narrative. Look up ODI 11647082 at NHTSA ↗
Owner report 11574540 · 2024-02-28 (February 28, 2024)
When driving the car at night with the headlights on, you notice a dark, thin object illuminated from the left front headlight approximately 50-75 feet ahead of the vehicle that will move as the steering is turned, either left or right. It looks like a thin pedestrian moving into the path of the car. I noticed this defect within the first few weeks of ownership. I took the car to the dealership and showed my pictures of the lights with the shadow at night to two Mercedes Benz of Sarasota employees. The dealership ran multiple diagnostic tests …
Owner-reported narrative. Look up ODI 11574540 at NHTSA ↗
Owner report 11677934 · 2025-08-02 (August 2, 2025)
•Incident Details: •Both sudden shutdown incidents •“12V Battery” warning (first incident) •“Stop - Switch Off Vehicle” warning (second incident) •That it happened with children in the car on a tollway Safety Concerns: •Loss of power steering/braking •Risk of collision •Repeated failures on a 1-year-old vehicle
Owner-reported narrative. Look up ODI 11677934 at NHTSA ↗