"How reliable is the 2021 Mercedes-Benz Glc 300?"

"Based on 82 NHTSA complaints, the 2021 Mercedes-Benz Glc 300 has a median complaint mileage of 19369 miles. The most common issue is ENGINE."

"What are common problems with the 2021 Mercedes-Benz Glc 300?"

"The most frequently reported component in NHTSA complaints for the 2021 Mercedes-Benz Glc 300 is ENGINE, accounting for a significant portion of the 82 total complaints filed."

2021 Mercedes-Benz Glc 300: Reliability Data

Source: NHTSA — 82 complaints

Total Complaints

19,369mi

Median Mileage

ENGINE

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

144 25th Percentile

19,369 Median Mileage

38,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE

EXTERIOR LIGHTING

FUEL/PROPULSION SYSTEM

ELECTRICAL SYSTEM

UNKNOWN OR OTHER

STRUCTURE:BODY

POWER TRAIN

VISIBILITY/WIPER

VEHICLE SPEED CONTROL

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"I HAVE PURCHASED THE 2021 MERCEDES-BENZ GLC 300 4MATIC COUPE AND NOTICED A DESIGN FLAW ON THE CAR. AS YOU CAN SEE IN THE ATTACHED PICTURE, THE FRONT BUMPER PROVIDES NO PROTECTION TO THE RADIATOR. IT HAS ALREADY STARTED CHIPPING DUE TO THE ROCK DAMAGE. THIS CAN LEAVE THE CAR IMPAIRED ON THE FREEWAY W..."

"THERE IS AN EXISTING ISSUE FOR MERCEDES-BENZ VEHICLES. SERVICE CAMPAIGN #2019040010. HOWEVER, IT ONLY INCLUDES 2019 MODELS. I PURCHASED A 2021 GLC MODEL AND IT HAS THE SAME ISSUE OF NOT HAVING THE PROTECTION ON FRONT RADIATOR. LOOKS LIKE MERCEDES-BENZ DIDNT DO ANYTHING ABOUT THIS ISSUE AND KEPT MAKI..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28