2018 Mercedes-Benz Gls 450: Reliability Data

Source: NHTSA — 20 complaints
20
Total Complaints
8,000mi
Median Mileage
SERVICE BRAKES
Top Issue
1
Crash Reports

When Do Complaints Happen?

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

8,000 25th Percentile
8,000 Median Mileage
8,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

SERVICE BRAKES
3
SUSPENSION
3
ENGINE
2
STRUCTURE:BODY
2
EXTERIOR LIGHTING
1
STEERING
1
ELECTRICAL SYSTEM
1
ELECTRONIC STABILITY CONTROL (ESC)
1
POWER TRAIN
1
ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
1

Severity Assessment

1
Crashes
5
Fires
0
Injuries
0
Deaths

Sample Complaint Reports

"MY GLS-450 HAS THE 'LIGHTING PACKAGE' WITH ACTIVE LED HEADLAMPS INCLUDING 'CORNER-ILLUMINATING FRONT HEADLAMPS, ACTIATED (ACTIVATED SPELLED WRONG) BY THE STEERING WHEEL OR TURN-SIGNAL USE, BRIGHTEN YOUR WAY INTO DRIVEWAYS AND GARAGES.' AS I LIVE IN A VERY DARK RURAL AREA, I ORDERED THESE LIGHTS. I..."
"THIS IS A COMPLAINT ABOUT THE STEERING PILOT PART OF THE DRIVER ASSISTANCE PACKAGE OPTION I HAVE ON MY 2018 MERCEDES-BENZ GLS-450. THE STEERING PILOT IS SO POORLY DEVELOPED IT HAS ALMOST CAUSED ME TO CRASH SEVERAL TIMES, SO I HAVE TURNED IT OFF MOST OF THE TIME. THE MBUSA WEBSITE SAYS OF STEERING ..."
"TL* THE CONTACT OWNS A 2018 MERCEDES-BENZ GLS450. WHILE DRIVING 70 MPH, THE VEHICLE LOST POWER AND ALL THE WARNING INDICATORS ON THE INSTRUMENT PANEL ILLUMINATED. ALSO, WHEN THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE FAILED TO STOP. THE CONTACT STATED THAT THE VEHICLE FINALLY STOPPED UPON REACHING A..."

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