2021 Mercedes-Benz AMG GLC63 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
2 owner complaints analyzed
6 distinct recall campaigns
65,000 mi median reported failure mileage
Scope: 2021 model year. Data snapshot: . 1 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Electrical System:Ignition:Coil is the most frequently named component, appearing in 1 of 2 complaints (50.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 1 | 50.0% |
| Fuel system concerns | 1 | 50.0% |
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 |
|---|---|
| Electrical System:Ignition:Coil | 1 |
| Engine | 1 |
| Power Train | 1 |
| Suspension | 1 |
Electrical System:Ignition:Coil: 1; Engine: 1; Power Train: 1; Suspension: 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 | 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: 0; 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
50,000 to 74,999 miles has the most reports with usable mileage (1). 1 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 | 1 |
| 2026 | 1 |
2025: 1; 2026: 1
Pattern summary
Electrical System:Ignition:Coil leads the component reports. Braking behavior appears in 1 complaint narratives. Fuel system concerns 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.
Owner report 11725180 · 2026-03-18 (March 18, 2026)
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…
Owner-reported narrative. Look up ODI 11725180 at NHTSA ↗