Mercedes-Benz AMG GLC63 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
8 owner complaints analyzed
21 distinct recall campaigns
12,000 mi median reported failure mileage
Scope: 2018 to 2021 model years. Data updated: . 5 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Owner-reported patterns
Most common problems
Engine is the most frequently named component, appearing in 3 of 8 complaints (37.5%). A complaint can name multiple components.
Recurring terms in complaint narratives
Topic
Matching reports
Share of complaints
Braking behavior
2
25.0%
Steering behavior
2
25.0%
Transmission and shifting
1
12.5%
Engine operation
1
12.5%
Fuel system concerns
1
12.5%
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.
Engine
3
Power Train
2
Unknown Or Other
2
Electrical System
1
Electrical System:Ignition:Coil
1
Steering
1
Suspension
1
Component breakdown data
Category
Count
Engine
3
Power Train
2
Unknown Or Other
2
Electrical System
1
Electrical System:Ignition:Coil
1
Steering
1
Suspension
1
Engine: 3; Power Train: 2; Unknown Or Other: 2; Electrical System: 1; Electrical System:Ignition:Coil: 1; Steering: 1; Suspension: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
Under 25,000
4
25,000 to 49,999
0
50,000 to 74,999
1
75,000 to 99,999
0
100,000 to 149,999
0
150,000 and above
0
Reported problems by failure mileage data
Category
Count
Under 25,000
4
25,000 to 49,999
0
50,000 to 74,999
1
75,000 to 99,999
0
100,000 to 149,999
0
150,000 and above
0
Under 25,000: 4; 25,000 to 49,999: 0; 50,000 to 74,999: 1; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (4). 3 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.
Engine leads the component reports. Braking behavior appears in 2 complaint narratives. Steering behavior appears in 2 complaint narratives. Transmission and shifting appears in 1 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.
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
TL* THE CONTACT OWNS A 2019 MERCEDES-BENZ GLC63C4. THE CONTACT STATED THAT THE STEERING WHEEL SHOOK AND VIBRATED. WHEN TURNING THE VEHICLE, IT WOBBLED, MADE A LOUD KNOCKING NOISE, JERKED, AND SKIPPED WHEN THE CONTACT ATTEMPTED TO COMPLETE A TURN. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF THE WOODLANDS (16917 INTERSTATE I45, CONROE, TX 77385, [phone removed]), BUT WAS NOT DIAGNOSED. THE DEALER TEST DROVE THE VEHICLE AND WAS ABLE TO RECREATE THE FAILURE. THE DEALER STATED THAT THE VEHICLE WAS PERFORMING NORMALLY. THE VEHICLE WAS NOT REPAIRED. THE…
The contact owns a 2020 Mercedes-Benz GLC63. The contact stated that while his wife was driving at highway speeds, the vehicle inadvertently decelerated while the accelerator pedal was being depressed. The check engine warning light illuminated, and a message displayed on the instrument panel stated that the “Transmission Needs to Cool, Stop and Pull Over Immediately”. The contact stated that the vehicle had locked in first gear and decelerated to approximately 55 MPH. Additionally, the contact stated that his wife was able to navigate the vehi…
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
8 unique complaints in this selection. Analysis snapshot: 2026-10-01.
62.5%Usable mileage5 / 8 records
100.0%Valid incident date8 / 8 records
100.0%Valid filing date8 / 8 records
100.0%Ordered incident and filing dates8 / 8 records
Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.
Problems by model year
Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.
Component complaint heatmap
Component
2018
2019
2020
2021
Engine
1100.0%ODI 11330356 · 12,000 mi
I PURCHASED THIS CAR IN 08/2018 WITH 900MILES CERTIFIED PRE OWN. I HAVE TAKEN IT TO DEALER 4 SEPARATE OCCASIONS FOR ENGINE LIGHT. EACH TIME THEY HAVE KEPT IT FOR OVER 2 WKS. THIS LAST TIME THE ENGINE LIGHT WENT ON IN MAY 2020. WE WERE ON FREEWAY GOING ABOUT 70MPH WHEN THE ENGINE WENT ON AND THE CAR LOST POWER AND CAME TO ALMOST A COMPLETE STOP IN MIDDLE OF FREEWAY. I HIT MY HEAD ON FRONT WINDSHIELD DUE TO THE IMPACT. THE DEALER STATES IT HAS BEEN REPAIRED BUT SAME PROBLEMS OCCUR ALMOST MONTHLY. *TR
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
The contact owns a 2020 Mercedes-Benz GLC63. The contact stated that while his wife was driving at highway speeds, the vehicle inadvertently decelerated while the accelerator pedal was being depressed. The check engine warning light illuminated, and a message displayed on the instrument panel stated that the “Transmission Needs to Cool, Stop and Pull Over Immediately”. The contact stated that the vehicle had locked in first gear and decelerated to approximately 55 MPH. Additionally, the contact stated that his wife was able to navigate the vehi…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
The SIM has the potential to become disabled and won’t connect to the mobile network. They have announced the problem but it has been months with no remedy even though it’s stated to be performed over the air. If I get into an accident there is a chance emergency responders will show up late if at all. This risk is there everytime I drive my vehicle
The contact owns a 2021 Mercedes-Benz AMG GLC63. The vehicle was taken to the local dealer for routine maintenance, and the contact was informed that there was an issue with the ignition coil. There was a misfire coming from the engine. The dealer determined that the ignition coil needed to be replaced. The vehicle was not repaired. Upon investigation, the contact linked the failure to Technical Service Bulletin: 2021070006. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was appr…
TL* THE CONTACT OWNS A 2019 MERCEDES-BENZ GLC63C4. THE CONTACT STATED THAT THE STEERING WHEEL SHOOK AND VIBRATED. WHEN TURNING THE VEHICLE, IT WOBBLED, MADE A LOUD KNOCKING NOISE, JERKED, AND SKIPPED WHEN THE CONTACT ATTEMPTED TO COMPLETE A TURN. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF THE WOODLANDS (16917 INTERSTATE I45, CONROE, TX 77385, [phone removed]), BUT WAS NOT DIAGNOSED. THE DEALER TEST DROVE THE VEHICLE AND WAS ABLE TO RECREATE THE FAILURE. THE DEALER STATED THAT THE VEHICLE WAS PERFORMING NORMALLY. THE VEHICLE WAS NOT REPAIRED. THE…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.
Failure mileage by component
Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.
Component failure mileage distribution
Component
Mileage range (25th–75th percentile)
Median
Usable records
Examples
Engine
Too few reports for a range
12,000 mi
1 (sparse)
ODI 11330356 · 12,000 mi
I PURCHASED THIS CAR IN 08/2018 WITH 900MILES CERTIFIED PRE OWN. I HAVE TAKEN IT TO DEALER 4 SEPARATE OCCASIONS FOR ENGINE LIGHT. EACH TIME THEY HAVE KEPT IT FOR OVER 2 WKS. THIS LAST TIME THE ENGINE LIGHT WENT ON IN MAY 2020. WE WERE ON FREEWAY GOING ABOUT 70MPH WHEN THE ENGINE WENT ON AND THE CAR LOST POWER AND CAME TO ALMOST A COMPLETE STOP IN MIDDLE OF FREEWAY. I HIT MY HEAD ON FRONT WINDSHIELD DUE TO THE IMPACT. THE DEALER STATES IT HAS BEEN REPAIRED BUT SAME PROBLEMS OCCUR ALMOST MONTHLY. *TR
The contact owns a 2020 Mercedes-Benz GLC63. The contact stated that while his wife was driving at highway speeds, the vehicle inadvertently decelerated while the accelerator pedal was being depressed. The check engine warning light illuminated, and a message displayed on the instrument panel stated that the “Transmission Needs to Cool, Stop and Pull Over Immediately”. The contact stated that the vehicle had locked in first gear and decelerated to approximately 55 MPH. Additionally, the contact stated that his wife was able to navigate the vehi…
The contact owns a 2021 Mercedes-Benz AMG GLC63. The vehicle was taken to the local dealer for routine maintenance, and the contact was informed that there was an issue with the ignition coil. There was a misfire coming from the engine. The dealer determined that the ignition coil needed to be replaced. The vehicle was not repaired. Upon investigation, the contact linked the failure to Technical Service Bulletin: 2021070006. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was appr…
TL* THE CONTACT OWNS A 2019 MERCEDES-BENZ GLC63C4. THE CONTACT STATED THAT THE STEERING WHEEL SHOOK AND VIBRATED. WHEN TURNING THE VEHICLE, IT WOBBLED, MADE A LOUD KNOCKING NOISE, JERKED, AND SKIPPED WHEN THE CONTACT ATTEMPTED TO COMPLETE A TURN. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF THE WOODLANDS (16917 INTERSTATE I45, CONROE, TX 77385, [phone removed]), BUT WAS NOT DIAGNOSED. THE DEALER TEST DROVE THE VEHICLE AND WAS ABLE TO RECREATE THE FAILURE. THE DEALER STATED THAT THE VEHICLE WAS PERFORMING NORMALLY. THE VEHICLE WAS NOT REPAIRED. THE…
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.
Monthly counts, recall campaigns and complaint examples
Monthly complaint and recall timeline
Month
Complaints
Campaigns announced
Examples
2024-11
0
None
No examples available for this selection.
2024-12
0
None
No examples available for this selection.
2025-01
0
None
No examples available for this selection.
2025-02
0
None
No examples available for this selection.
2025-03
0
None
No examples available for this selection.
2025-04
0
None
No examples available for this selection.
2025-05
0
None
No examples available for this selection.
2025-06
0
None
No examples available for this selection.
2025-07
0
None
No examples available for this selection.
2025-08
1
None
ODI 11682158
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
The contact owns a 2021 Mercedes-Benz AMG GLC63. The vehicle was taken to the local dealer for routine maintenance, and the contact was informed that there was an issue with the ignition coil. There was a misfire coming from the engine. The dealer determined that the ignition coil needed to be replaced. The vehicle was not repaired. Upon investigation, the contact linked the failure to Technical Service Bulletin: 2021070006. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was appr…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.
This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.
No complete months meet the spike thresholds for this selection.
Equal-age model-year comparison
Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.
2020: 1 complaints · 2021: 1 complaints
Equal observation windows
Model year
Through age 0
Through age 1
Through age 2
2020
1
1
1
2021
0
0
1
Date coverage across each selected cohort
Date basis for all complaints in selected model years
Year
Incident dates used
Filing date fallbacks
Excluded dates
2020
2
0
0
2021
2
0
0
Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.
Components reported together
Each cell counts unique complaints naming both components. Open a nonzero cell for examples.
Component co-occurrence matrix
Component
Engine
Power Train
Unknown Or Other
Electrical System
Electrical System:Ignition:Coil
Steering
Suspension
Engine
—
1ODI 11725180
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
Co-reporting does not establish that one component caused another concern.
Recurring narrative patterns
Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.
4 patterns with matching reports.
Stalling or loss of power
2 mentions · 25.0% of complaints
Median mileage: 12,000 mi (1 usable records).
ODI 11330356 · 12,000 mi
I PURCHASED THIS CAR IN 08/2018 WITH 900MILES CERTIFIED PRE OWN. I HAVE TAKEN IT TO DEALER 4 SEPARATE OCCASIONS FOR ENGINE LIGHT. EACH TIME THEY HAVE KEPT IT FOR OVER 2 WKS. THIS LAST TIME THE ENGINE LIGHT WENT ON IN MAY 2020. WE WERE ON FREEWAY GOING ABOUT 70MPH WHEN THE ENGINE WENT ON AND THE CAR LOST POWER AND CAME TO ALMOST A COMPLETE STOP IN MIDDLE OF FREEWAY. I HIT MY HEAD ON FRONT WINDSHIELD DUE TO THE IMPACT. THE DEALER STATES IT HAS BEEN REPAIRED BUT SAME PROBLEMS OCCUR ALMOST MONTHLY. *TR
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.
Matching rule\b(stall\w*|loss of power|lost power|engine shut\w* off)\b
Warning lights and dashboard alerts
2 mentions · 25.0% of complaints
Median mileage: 24,000 mi (1 usable records).
ODI 11549774 · 24,000 mi
The contact owns a 2020 Mercedes-Benz GLC63. The contact stated that while his wife was driving at highway speeds, the vehicle inadvertently decelerated while the accelerator pedal was being depressed. The check engine warning light illuminated, and a message displayed on the instrument panel stated that the “Transmission Needs to Cool, Stop and Pull Over Immediately”. The contact stated that the vehicle had locked in first gear and decelerated to approximately 55 MPH. Additionally, the contact stated that his wife was able to navigate the vehi…
This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-r…
TL* THE CONTACT OWNS A 2019 MERCEDES-BENZ GLC63C4. THE CONTACT STATED THAT THE STEERING WHEEL SHOOK AND VIBRATED. WHEN TURNING THE VEHICLE, IT WOBBLED, MADE A LOUD KNOCKING NOISE, JERKED, AND SKIPPED WHEN THE CONTACT ATTEMPTED TO COMPLETE A TURN. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF THE WOODLANDS (16917 INTERSTATE I45, CONROE, TX 77385, [phone removed]), BUT WAS NOT DIAGNOSED. THE DEALER TEST DROVE THE VEHICLE AND WAS ABLE TO RECREATE THE FAILURE. THE DEALER STATED THAT THE VEHICLE WAS PERFORMING NORMALLY. THE VEHICLE WAS NOT REPAIRED. THE…
Engine runs rough and activates a flashing engine light. Sounds like the engine is misfiring. On two occasions the engine stalled,(no power steering, brakes...) luckily not in a dangerous situation. No engine codes were visible to a technician when try to diagnose. Car seemed to run fine again after restart.