2023 Mercedes-Benz Glc 300 4matic problems, complaints & recalls
Most-reported problem areas: Structure:body (2) · Service Brakes, Hydraulic (2) · Vehicle Speed Control (1)
🧭 Reliability snapshot
Compared against other Mercedes-Benz Glc 300 4matic model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (4)
Latches/Locks/Linkages:doors:lock 2026-07-24 · campaign 26V481000 · 310,667 vehicles
Defect: 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.
Risk: A vehicle rollaway increases the risk of a crash or injury.
Fix: Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. 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.
Steering:critical Fasteners 2025-08-20 · campaign 25V533000 · 3,749 vehicles
Defect: 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.
Risk: A loose steering coupling can cause a loss of steering control, increasing the risk of a crash.
Fix: 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.
Exterior Lighting:headlights 2025-06-11 · campaign 25V365000 · 127 vehicles
Defect: 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."
Risk: Improperly adjusted headlights can reduce visibility, increasing the risk of a crash.
Fix: 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.
Structure:body:roof And Pillars 2025-06-06 · campaign 25V379000 · 92,851 vehicles
Defect: 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 Im
Risk: In the event of a crash, insufficient impact protection can increase the risk of injury.
Fix: 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.
Service bulletins (162)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Steering 2026-09-26 · LI46.10-P-080896 · Service Bulletin/Repair Instructions
complaint slight creaking noises when steering. cause noises may come from one or more sleeves of the horn contact plate. remedy remove the horn contact plate and check the sleeves for noise; see attached video. if necessary, apply lubricant to the sleeves.
Electrical System 2026-09-25 · OTA-Comm. Mod. SW. Update · Over The Air
a software update will be performed that provides enhancements to the robustness and system stability of the communication module. the update is free of charge and runs in the background, which takes about 8 minutes to install. during this time, the vehicle can be driven without any restrictions, an
Visibility/Wiper 2026-09-25 · LI83.90-P-080935 · Service Bulletin/Repair Instructions
complaint cel illuminates and/or ac does not blow cold. cause potentially relevance to hardware and/or software remedy scenario 1: 1. if the ac does not blow cold air, replace compressor (if compressor's index and part number figure 1 match against table 1). a. if the compressor does not fall within
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Electrical System 2026-09-17 · LI54.30-P-080963 · Service Bulletin/Repair Instructions
complaint issue after ota update ic odometer reading blank("_ _ _ _") ic maintanence data unavailable cause ota update e61.0 remedy in the ic control unit log, please check the following information: verify whether dtcs b228229, b228287, and b226656 are present in either a or a+s. verify that status
Electrical System 2026-09-15 · LI82.60-P-080383 · Service Bulletin/Repair Instructions
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 temporary glitch is causing the head unit application to fail to overwrite the pr
Showing the 6 most recent of 162 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-07-24 · Service Brakes, Hydraulic · 39,000 mi“the contact owns a 2023 mercedes-benz glc 300 4matic. the contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the brake pedal felt as if it had released, and the vehicle failed to stop as needed. the contact stated that the failure was a recurring failure. the dealer was contacted but could not duplica…”
2026-07-01 · Forward Collision Avoidance: Automatic Emergency Braking“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 …”
2026-04-27 · Unknown Or Other“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 coll…”
2026-04-20 · Vehicle Speed Control“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 spe…”
2026-01-13 · Structure:body“the glass panel between the windshield and the sun roof shattered spontaneously…”
2025-11-15 · Unknown Or Other“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 f…”
2025-09-05 · Service Brakes, Hydraulic“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 infotai…”
2025-06-03 · Structure:body“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…”
2025-05-31 · Unknown Or Other“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 rec…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.