2020 Mercedes-Benz Glc 300: Reliability Data

Source: NHTSA — 83 complaints
83
Total Complaints
21,250mi
Median Mileage
ENGINE
Top Issue
4
Crash Reports

When Do Complaints Happen?

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

3,000 25th Percentile
21,250 Median Mileage
36,914 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE
18
UNKNOWN OR OTHER
15
STEERING
5
ELECTRICAL SYSTEM
4
EXTERIOR LIGHTING
4
SERVICE BRAKES
3
BACK OVER PREVENTION
3
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
3
STRUCTURE:BODY
3
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
3

Severity Assessment

4
Crashes
0
Fires
7
Injuries
0
Deaths

Sample Complaint Reports

"DRIVING ALONG RANDOM TRAFFIC NO PATTERN, AUTOMATIC BRAKE ASSIST IS TEMPORARILY NOT ACTIVE , BRIGHT YELLOW WORDING, DANGER AUTO BRAKE ASSIST WILL NOT FUNCTION AT THIS TIME."
"THE VEHICLE WONDERS WITHIN THE LANE WHEN MERCEDES DISTRONIC DRIVER ASSISTANCE IS ACTIVATED, PARTICULARLY ON GENTLE CURVES AT HIGHWAY SPEEDS. IT WILL HIT LANE BUMPS UNLESS THE DRIVER ACTIVELY STEERS AWAY FROM THE LANE MARKINGS. THE 2020 GLC3004MATIC HAS BEEN DOING THIS SINCE WE PURCHASED IT NEW ON J..."
"THE AUDIBLE TIC-TOK SOUND OF THE TURN SIGNAL IS WAY TOO SOFT. THE SOUND IS SUPPOSED TO GIVE ONE NOTICE THAT THE TURN SIGNAL IS ON. IT SIMPLY ISN'T LOUD ENOUGH TO PROVIDE THAT FEEDBACK. CONSEQUENTLY I OFTEN FIND THAT I'M DRIVING DOWN THE STREET HAVING COMPLETED A HALF-TURN ( ONE WHERE IT DOESN'T..."

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