2017 Mercedes-Benz Gls450: Reliability Data

Source: NHTSA — 51 complaints
51
Total Complaints
13,000mi
Median Mileage
ELECTRICAL SYSTEM
Top Issue
2
Crash Reports

When Do Complaints Happen?

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

3,825 25th Percentile
13,000 Median Mileage
40,548 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM
8
ENGINE
7
UNKNOWN OR OTHER
7
EXTERIOR LIGHTING
6
STEERING
4
FUEL/PROPULSION SYSTEM
4
POWER TRAIN
2
SEATS
2
SUSPENSION
2
WHEELS
1

Severity Assessment

2
Crashes
12
Fires
1
Injuries
0
Deaths

Sample Complaint Reports

"HEADRESTS IN THE 2ND ROW ARE UNSAFE, IN THE UP POSITION IT HAS NO PROTECTION FOR CHILDREN OR ADULTS, IN THE DOWN POSITION IT PUSHES THE NECK AND HEAD OF ALL PASSENGERS FORWARD."
"REAR DIFFERENTIAL AXLE SEALS WERE DISTORTED, CAUSING FLUID TO LEAD OUT. THE SEALS APPEAR TO HAVE BEEN INSTALLED INCORRECTLY WHEN THE CAR WAS MANUFACTURED. SEALS HAVE BEEN REPLACED PRIOR TO ANY ADDITIONAL PROBLEMS WITH THE VEHICLE OR DRIVE TRAIN. DEALER REPLACED SEAL QUICKLY AND PROMPTLY. DEALERSHIP ..."
"VEHICLE IS ONLY 3 WEEKS OLD. A FAULTY ENGINE WIRE HARNESS CAUSED THE VEHICLE TO CEASE OPERATING IN TRAFFIC AND PUT MY FAMILY IN A POTENTIALLY LIFE THREATENING SITUATION. MERCEDES DID NOT REPLACE BUT ONLY "REPAIRED" THE WIRE, WHICH WE WERE TOLD WAS NOT ASSEMBLED CORRECTLY AND WAS PINCHED IN A BRACKE..."

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