FaultScore

Mercedes Benz GLS450 problems

Owners have filed 100 complaints about the Mercedes Benz GLS450 with NHTSA across model years 2017 to 2021. More of them are about the electrical system than anything else.

Every Mercedes Benz GLS450 year, graded

The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded
Year Grade Complaints Crashes Fires Median miles Most reported
2021 41 1 4 11,000 Electrical System
2020 1 0 0 Fuel & Propulsion
2019 7 2 0 13,000 Engine & Cooling
2017 51 2 12 13,000 Electrical System

What breaks on a Mercedes Benz GLS450

Across every model year on file. Follow a row for that part's complaints and the year it was worst.

Electrical System 23 23.0%

Worst in 2021

Other & Unspecified 16 16.0%

Worst in 2021

Engine & Cooling 11 11.0%

Worst in 2017

Fuel & Propulsion 8 8.0%

Worst in 2017

Driver Assist & Collision Avoidance 8 8.0%

Worst in 2021

Lights 6 6.0%

Worst in 2017

Steering 4 4.0%

Worst in 2017

Seats 4 4.0%

Worst in 2017

Transmission & Drivetrain 3 3.0%

Worst in 2017

Body & Structure 3 3.0%

Worst in 2017

Brakes 2 2.0%

Worst in 2017

Suspension 2 2.0%

Worst in 2017

Acceleration & Cruise Control 2 2.0%

Worst in 2019

Windows, Mirrors & Wipers 2 2.0%

Worst in 2017

Complaints filed over time

Every complaint about every Mercedes Benz GLS450, by the month it reached NHTSA.

May 2016 peak 10 Jan 2026

Compare the Mercedes Benz GLS450

Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.