IllustrationMy sunroof exploded while driving on the interstate.
2023 MERCEDES-BENZ Glc 300
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2023 MERCEDES-BENZ Glc 300 do not stand out strongly from the model-year median of 55.
About this comparison →How this year compares
Owner complaints by model year
Compare all Glc 300 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 6 of 55 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Electrical System. Review the 30 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Exterior Lighting. Review the 10 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
2 crash reports0 fire reports2 injury reports
Unknown Or Other complaints
8 reportsThe sunroof glass blasted and shattered during a drive on an interstate highway. I was driving normally when I heard a loud sound like a tire burst or gunshot. Initially, I thought that my tire had busted. I took an exit and stopped to inspect the tires. I found them to be okay, but I was puzzled where the sound came from. I st…
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The sunroof glass blasted and shattered during a drive on an interstate highway. I was driving normally when I heard a loud sound like a tire burst or gunshot. Initially, I thought that my tire had busted. I took an exit and stopped to inspect the tires. I found them to be okay, but I was puzzled where the sound came from. I started driving again and observed that a lot of outside noise was coming, also there was a glass clinking noise so I stopped again to check. I found a hole in my sunroof and the shattered glass had fallen on the protective mesh cloth. That is when I realized that the loud sound was from this broken sunroof. It was something like that the sunroof had blasted outwards as the bump was going outside. Luckily, I didn't lose control of that sudden, loud sound and didn't get into a crash. Hopefully, the broken glass didn't fly and hit other cars.
The automatic windows open when the car is parked without being initiated by anyone. Think of it as phantom window opening. The vehicle occasionally reports a window being open when in fact they are all closed. When the phantom opening occurs there is not notice of a window being open.
When working in the rear cargo area, the door comes down without warning and does not break when it meets resistance trapping me between the body of the car and the descending door. A great deal of physical pressure must be employed in trying to get it to reverse direction. It is a struggle to get out from under the continually …
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When working in the rear cargo area, the door comes down without warning and does not break when it meets resistance trapping me between the body of the car and the descending door. A great deal of physical pressure must be employed in trying to get it to reverse direction. It is a struggle to get out from under the continually closing door. This has happend to me on three different occasions. There should be an automatic reversal when the door meets resistance not unlike a garage door.
I bought this car brand with 4800 miles directly from Mercedes a month ago. The check engine light has been on since the second week of ownership. The reason I’m submitting this report is because it’s been into warranty service 4 times. Each time Mercedes Benz says that it is a known issue affecting ALL GLC300 models. They als…
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I bought this car brand with 4800 miles directly from Mercedes a month ago. The check engine light has been on since the second week of ownership. The reason I’m submitting this report is because it’s been into warranty service 4 times. Each time Mercedes Benz says that it is a known issue affecting ALL GLC300 models. They also indicate that it is a software issue, but don’t have a patch for it. There are other things like Bluetooth, no radio audio, and the remote start that they are also attributing to this software glitch. However, the check engine light presents a MAJOR safety issue. Please force Mercedes to issue a software update recall to fix the incessant check engine light.
Unknown: Driving on Route I 71 south in Cincinnati going CVG to pick up wife. 60-70 MPH. All systems normal.Suddenly out of blue , Brakes slam on 3-3 seconds seatbelt locks on and car deaccelerates with no warning , no lights , no registered failure. Belt compression severe, almost brushing strength. My wife has a spinal injury…
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Unknown: Driving on Route I 71 south in Cincinnati going CVG to pick up wife. 60-70 MPH. All systems normal.Suddenly out of blue , Brakes slam on 3-3 seconds seatbelt locks on and car deaccelerates with no warning , no lights , no registered failure. Belt compression severe, almost brushing strength. My wife has a spinal injury, cage in her neck ., must wear brace . She was not driving, tell Chris Walker to have service pick up , take care of open recall, fix sudden development of violent sudden deceleration with Violent seat belt tensioner compression . Really catastrophic Situation. Could have occurred . Glad I was driving . Could have been tragic. 3rd glc300 17-23 ?????????????????????!!!!!!!!!!
Brand new car that had less than 1500 miles on it, one day went to start it while 20 miles away from home and error messages in dash and beeping "48V battery error, do not change transmission position, reduced functionality of driver assistance features...etc." and car would not start, could not turn steering wheel.
VEHICLE SHUT DOWN WHILE DRIVING. WARNING LIGHTS ILLUMINATE, CHECK ENGINE LIGHT, DO NOT SHIFT INTO GEAR WARNING, 48V BATTERY WARNING, ETC. WOULD NOT STOP ALARMING. COULD NOT SHUT OFF CAR. COULD NOT PUT CAR INTO PARK. COULD NOT START CAR. WARNING BUZZER WOULD GO OFF ENTIRE TIME. CAR WAS ONLY ABLE TO BE STARTED WHEN REMOTE START RE…
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VEHICLE SHUT DOWN WHILE DRIVING. WARNING LIGHTS ILLUMINATE, CHECK ENGINE LIGHT, DO NOT SHIFT INTO GEAR WARNING, 48V BATTERY WARNING, ETC. WOULD NOT STOP ALARMING. COULD NOT SHUT OFF CAR. COULD NOT PUT CAR INTO PARK. COULD NOT START CAR. WARNING BUZZER WOULD GO OFF ENTIRE TIME. CAR WAS ONLY ABLE TO BE STARTED WHEN REMOTE START REQUEST WAS INITIATED WHEN CAR WAS IN THIS MODE, CAR WAS STARTED BUT THEN SHUT OFF 10 SECONDS LATERS APP STATES, “CHECK ENGINE LIGHT ON” WIL SHUT OFF THE CAR. CAR BACK TO NORMAL AFTER EVENT APPROX 60 MIN BUT CHECK ENGINE LIGHT REMAINS ON.
Official recalls
1226V481000 · Latches/locks/linkages:doors:lock
Jul 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 & remedy
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.
25V533000 · Steering:critical Fasteners
Aug 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 & remedy
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.
25V365000 · Exterior Lighting:headlights
Jun 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 & remedy
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.
25V379000 · Structure:body:roof And Pillars
Jun 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 & remedy
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.
25V255000 · Electrical System:wiring:fuses And Circuit Breakers
May 12, 2025
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 C-Class, E-Class, S-Class, SL, GLC, EQE SUV, EQE, EQS SUV, and EQS vehicles that were incorrectly repaired under recall 24V-115. An incorrect fuse box that was not designed for the vehicle may have been installed.
Consequence & remedy
Consequence: An incorrect fuse box can result in a sudden loss of drive power or a loss of critical safety functions such as the restraint systems or instrument cluster, increasing the risk of a crash or injury. Additionally, there could be an increased risk of a fire.
Remedy: Dealers will inspect and replace the main fuse boxes, free of charge. Owner notification letters were mailed June 6, 2025. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2025050003/4.
24V808000 · Seats:critical Fasteners
Oct 25, 2024
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC 300 and GLC 300 4MATIC vehicles. The driver's and front passenger seat rail may have been incorrectly attached to the vehicle body.
Consequence & remedy
Consequence: An incorrectly attached seat may not properly restrain the driver during a crash, increasing the risk of injury.
Remedy: Dealers will inspect the bolt connection and tighten the bolts between the driver and front passenger seat rail and the vehicle body, free of charge. Owner notification letters were mailed December 4, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
24V520000 · Structure:interior Panels:dashboard
Jul 8, 2024
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC 300 4MATIC vehicles. Certain dashboard area bolts may have been insufficiently tightened, potentially causing improper air bag deployment or parts separation during a crash. In addition, the 12-Volt electric auxiliary heater connections may be loose, possibly causing the electrical wiring to overheat.
Consequence & remedy
Consequence: An improper air bag deployment increases the risk of injury in a crash. Overheated wiring can increase the risk of a fire.
Remedy: Dealers will inspect and tighten the bolts as necessary, free of charge. Owner notification letters were August 23, 2024. Owner may contact MBUSA customer service at 1-877-496-3691.
24V115000 · Electrical System:wiring:fuses And Circuit Breakers
Feb 16, 2024
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 C300, AMG C43, S580e, S580, Maybach S580, Maybach S680, AMG SL43, AMGSL63, GLC300, EQE350, EQE500, EQS450, EQS580, AMG EQS, 2023 S500, AMG SL55, AMG EQE, 2024 E350, E450, AMG C63e S, CLE300 Coupe, CLE450 Coupe, and GLC300 Coupe vehicles. The 80-Amp fuses may have been manufactured incorrectly, which can cause the fuses to fail.
Consequence & remedy
Consequence: An 80-Amp fuse that fails can result in a sudden loss of drive power or a loss of critical safety functions such as the restraint systems or instrument cluster, increasing the risk of a crash or injury. Additionally, there could be an increased risk of a fire.
Remedy: Dealers will replace the main fuse boxes, free of charge. Owner notification letters were mailed April 5, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024030008.
23V878000 · Engine And Engine Cooling:critical Fasteners; Fuel System, Gasoline:delivery:fuel Pump
Dec 21, 2023
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC300, 2024 GLE350, and GLE450 vehicles equipped with an M254 engine. The incorrect screws, installed on the high-pressure fuel pump, may prevent a proper seal from forming between the high-pressure fuel pump and the tandem oil pump.
Consequence & remedy
Consequence: An inadequate seal can allow fuel and oil to leak onto the road, creating a hazard for other road users and increasing the risk of a crash. Additionally, a fuel and oil leak in the presence of hot engine components can increase the risk of a fire.
Remedy: Dealers will replace the high-pressure fuel pump, free of charge. Owner notification letters were mailed February 9, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
Additional source detail variants (2)
Engine And Engine Cooling:critical Fasteners
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC300, 2024 GLE350, and GLE450 vehicles equipped with an M254 engine. The incorrect screws, installed on the high-pressure fuel pump, may prevent a proper seal from forming between the high-pressure fuel pump and the tandem oil pump.
Consequence: An inadequate seal can allow fuel and oil to leak onto the road, creating a hazard for other road users and increasing the risk of a crash. Additionally, a fuel and oil leak in the presence of hot engine components can increase the risk of a fire.
Remedy: Dealers will replace the high-pressure fuel pump, free of charge. Owner notification letters were mailed February 9, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
Fuel System, Gasoline:delivery:fuel Pump
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC300, 2024 GLE350, and GLE450 vehicles equipped with an M254 engine. The incorrect screws, installed on the high-pressure fuel pump, may prevent a proper seal from forming between the high-pressure fuel pump and the tandem oil pump.
Consequence: An inadequate seal can allow fuel and oil to leak onto the road, creating a hazard for other road users and increasing the risk of a crash. Additionally, a fuel and oil leak in the presence of hot engine components can increase the risk of a fire.
Remedy: Dealers will replace the high-pressure fuel pump, free of charge. Owner notification letters were mailed February 9, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
23V880000 · Fuel System, Gasoline:delivery:fuel Pump
Dec 21, 2023
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.
Consequence & remedy
Consequence: A loss of drive power can increase the risk of a crash.
Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 28, 2024. Owner notification letters will be mailed in phases, on February 23, 2024, April 19, 2024, June 28, 2024, August 9, 2024, October 1, 2024, and December 2, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 23V-445.
23V629000 · Trailer Hitches
Sep 11, 2023
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 GLC300 vehicles. The front tow eye may be inadequately threaded to the crossmember and can detach during towing.
Consequence & remedy
Consequence: A detached tow eye can separate the vehicle from the tow truck, increasing the risk of a crash or injury.
Remedy: Dealers will inspect and replace the front crossmember, as necessary, free of charge. Owner notification letters were mailed January 26, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2023090010/120002.
23V445000 · Fuel System, Gasoline:delivery:fuel Pump
Jun 26, 2023
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
Consequence & remedy
Consequence: A loss of drive power can increase the risk of a crash.
Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1DP23003 · Malfunction Indicator Light / No-Start
Opened Jul 25, 2023 · Closed May 20, 2024
Status: closed (inferred from source dates) · Power Train
In a letter dated July 2, 2023, Aldelberto A. Cordova (the petitioner) submitted a petition requesting that NHTSA initiate an investigation of an alleged defect within the “ISG 48-volt on-board electrical system,” which resulted in warning light illumination as well as an inability to start the vehicle in a 2023 Mercedes-Benz GLC300. ODI reviewed the petition, complaint data in NHTSA's databases and information gathered from an Information Request (IR) letter sent to Mercedes-Benz. Examination of this information indicates that the subject component listed in the petition is not capable of causing the a loss of motive power. The alleged defect cited in the petition was caused by a software deviation in the Central Powertrain Controller (CPC), which is a separate system and independent of the 48-volt system. After thoroughly assessing the material submitted by the petitioner, information in NHTSA's possession, information submitted by Mercedes-Benz, NHTSA does not find that a formal investigation is warranted. Accordingly, the Agency is denying the petition. As with all potential motor vehicle safety risks, NHTSA will continue to review any new information or incidents as they are submitted to the Agency. A Federal Register Notice (FRN) further detailing NHTSA's reasons for denial of the petition will be published in the future. The petition and its attachments can be reviewed at NHTSA.gov under reference ODI number 11533472.