2023 Mercedes-Benz GLC 300 4MATIC: complaints, problems and recalls
Explore the records behind recurring owner reports.
Key facts
9 owner complaints analyzed
4 distinct recall campaigns
39,000 mi median reported failure mileage
Scope: 2023 model year. Data snapshot: . 1 complaints include usable failure mileage.
Most common problems
Unknown Or Other is the most frequently named component, appearing in 4 of 9 complaints (44.4%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 2 | 22.2% |
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 |
|---|---|
| Unknown Or Other | 4 |
| Service Brakes, Hydraulic | 2 |
| Structure:Body | 2 |
| Equipment:Electrical:Infotainment | 1 |
| Forward Collision Avoidance: Adaptive Cruise Control | 1 |
| Forward Collision Avoidance: Automatic Emergency Braking | 1 |
| Power Train | 1 |
| Vehicle Speed Control | 1 |
Unknown Or Other: 4; Service Brakes, Hydraulic: 2; Structure:Body: 2; Equipment:Electrical:Infotainment: 1; Forward Collision Avoidance: Adaptive Cruise Control: 1; Forward Collision Avoidance: Automatic Emergency Braking: 1; Power Train: 1; Vehicle Speed Control: 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 | 0 |
| 25,000 to 49,999 | 1 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 1; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
25,000 to 49,999 miles has the most reports with usable mileage (1). 8 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 |
|---|---|
| 2025 | 4 |
| 2026 | 5 |
2025: 4; 2026: 5
Pattern summary
Unknown Or Other leads the component reports. Braking behavior appears in 2 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.
Examples from the source records
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11664103 · 2025-05-31 (May 31, 2025)
I have had numerous incidents since I purchased the vehicle in April of 2023. The first was when it would not start. It continuously ran through all of the error messages and simply refused to start. This happened numerous times, leaving me stranded for 20 minutes or longer. Then, the safety features would randomly stop functioning, and I would receive error messages stating that they were disabled. The check engine light would appear on the dashboard, and it continues to do so, even though I am told there is nothing wrong with the engine. My M…
Owner-reported narrative. Look up ODI 11664103 at NHTSA ↗
Owner report 11664589 · 2025-06-03 (June 3, 2025)
The rear door randomly closes with force unexpectantly. We contacted the Mercedes dealer where the car was purchased and is serviced. They responded it can not be fixed and was an ongoing concern of many owners
Owner-reported narrative. Look up ODI 11664589 at NHTSA ↗
Owner report 11685231 · 2025-09-05 (September 5, 2025)
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…
Owner-reported narrative. Look up ODI 11685231 at NHTSA ↗
Owner report 11699574 · 2025-11-15 (November 15, 2025)
When loading groceries in my trunk, the door randomly closes on my head. The last time this door closed while we were loading, I tried stopping it with my hand, by holding it, so my spouse doesnt get smashed, and it will not stop at all. There needs to be a safety feature installed to stop this trunk from closing if a person is underneath it. I fear that a child or an elderly person wont be able to move fast enough and will be severely harmed by this.
Owner-reported narrative. Look up ODI 11699574 at NHTSA ↗
Owner report 11710584 · 2026-01-13 (January 13, 2026)
The glass panel between the windshield and the sun roof shattered spontaneously
Owner-reported narrative. Look up ODI 11710584 at NHTSA ↗
Owner report 11732594 · 2026-04-20 (April 20, 2026)
The issue is regarding the “Traffic Sign Assist” (Owner’s Manual page 221) feature of the Adaptive Cruise Control System. Vehicle will be made available if requested. The function of the "Traffic Sign Assist" is to monitor roadside "Speed Limit" signs and the cruise control will increase or decrease speed to stay within the permissible legal speed limit. The system worked except occasionally it would change the indicated permissible speed limit on the instrument display when there is no corresponding roadside speed limit sign and the permis…
Owner-reported narrative. Look up ODI 11732594 at NHTSA ↗
Owner report 11733932 · 2026-04-27 (April 27, 2026)
I purchased a new Mercedes Benz GLC300 2023. Last month, my friend and I were driving on I75 in Florida when we heard what sounded like a loud boom or gunshot. We quickly discovered that my sunroof had exploded. The sunroof was closed, and fortunately so was the sunshade, as large pieces of glass flew off the roof and smaller shards of glass collected on top of the sunshade. My friend and I were fortunate to have not been insured and were able to safely navigate the vehicle to the side of the road to assess the damage. In contacting the MB d…
Owner-reported narrative. Look up ODI 11733932 at NHTSA ↗
Owner report 11747647 · 2026-07-01 (July 1, 2026)
My 2023 GLC300 suffered a severe, unprovoked emergency brake deployment in traffic, nearly causing a pileup. on [XXX]. The car has only 14,500 miles and has a chronic history of dangerous, unprovoked Active Brake Assist deployments. It broke down twice in its first month of ownership for other reasons, slammed on the brakes during a left-hand turn last year, nearly causing an accident and on [XXX] executed a violent, full-lock emergency stop from 25mph in light traffic with no obstacles in sight, nearly causing a multi-car pileup and putting me…
Owner-reported narrative. Look up ODI 11747647 at NHTSA ↗
Recall history
4 distinct campaigns affect this selection. Announcement dates below are different from vehicle model years. A campaign may cover multiple years.
25V365000 · Exterior Lighting:Headlights
Reported: 2025-06-11 (June 11, 2025)
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC 300 and GLC 300 4MATIC vehicles. The headlights are missing adjustment prevention caps, which can allow the headlights to be improperly adjusted. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Consequence: Improperly adjusted headlights can reduce visibility, increasing the risk of a crash.
Remedy: Dealers will inspect the headlights for sealing caps and install caps as necessary, free of charge. Owner notification letters were mailed July 18, 2025. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2025060005.
NHTSA campaign record ↗25V379000 · Structure:Body:Roof And Pillars
Reported: 2025-06-06 (June 6, 2025)
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2025 GLC 300, GLC 300 4MATIC, 2024-2025 AMG GLC 43 4MATIC, 2025 GLC 350E 4MATIC, and AMG GLC 63 S E vehicles equipped with a panoramic sunroof. In certain crash scenarios, where the rear occupant's head contacts the C-pillar, the pillar may not absorb an adequate amount of the impact. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 201, "Occupant Protection in Interior Impact."
Consequence: In the event of a crash, insufficient impact protection can increase the risk of injury.
Remedy: Dealers will modify the roof lining and C-pillar trim, free of charge. Owner notification letters were mailed July 9, 2025. Owners may contact MBUSA customer service at 1-800-367-6372.
NHTSA campaign record ↗25V533000 · Steering:Critical Fasteners
Reported: 2025-08-20 (August 20, 2025)
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2026 EQE and GLC vehicles. Please see the recall report for a complete list of models. The steering coupling bolt may have been improperly tightened, allowing the steering coupling to loosen from the steering rack.
Consequence: A loose steering coupling can cause a loss of steering control, increasing the risk of a crash.
Remedy: Dealers will tighten the steering coupling bolts as necessary, free of charge. Owner notification letters were mailed October 6, 2025. Owners may contact MBUSA customer service at 1-800-367-6372.
NHTSA campaign record ↗26V481000 · Latches/Locks/Linkages:Doors:Lock
Reported: 2026-07-24 (July 24, 2026)
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. Please refer to MBUSA's recall report for specific model information. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging automatically. This may result in a vehicle rollaway.
Consequence: A vehicle rollaway increases the risk of a crash or injury.
Remedy: Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. Owners may contact MBUSA customer service at 1-800-367-6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning July 31, 2026.
NHTSA campaign record ↗