Reliability & cost of ownership
Mercedes Benz GLS 450 Reliability & Common Problems
How reliable is the Mercedes Benz GLS 450? Compare every model year side by side — NHTSA recalls, owner complaints, and crash-test stars — then open the year you're shopping for its AI reliability outlook where NHTSA has enough data.
Mercedes Benz GLS 450 problems by model year
25 recall entries and 0 owner complaints on file across 3 model years, sourced from the federal NHTSA database.
| Year | Recalls | Complaints | NCAP stars | Full report |
|---|---|---|---|---|
| 2020 GLS 450 | 20 | 0 | No NCAP test | AI reliability outlook → |
| 2019 GLS 450 | 2 | 0 | No NCAP test | Recalls & complaints → |
| 2018 GLS 450 | 3 | 0 | No NCAP test | AI reliability outlook → |