Reliability report
Mercedes-Benz GLS reliability and common faults
Based on 1,629 roadworthiness tests, led by the UK MOT. Each country is compared only with its own average for cars of the same age.
🇬🇧 United Kingdom · MOT
12.3%
fail rate · average 16.9%
much better than average
1,629 MOT tests (DVSA)
Testing regimes differ from country to country – don’t compare the figures between countries; compare each one only with its own average. MOT data: contains public sector information licensed under the Open Government Licence v3.0.
Weak spots
What goes wrong on the Mercedes-Benz GLS
How often each area fails compared with the average car of the same age (vertical line = average, 100%). Red – more often than average.
Plates and identification
Wheels
Body and structure
Tyres
Exhaust and emissions
Seat belts and airbags
Brakes
Lights and electrics
Visibility
Suspension
Results by vehicle age
| Age | 🇬🇧 MOT fail rate | 🇳🇱 APK defects |
|---|---|---|
| 6–8 years | 12.3% avg 15.3% | — |
| 9–11 years | 12.6% avg 22.9% | — |
Mercedes-Benz GLS – FAQs
How reliable is the Mercedes-Benz GLS?+
In the UK the Mercedes-Benz GLS fails 12.3% of MOT tests, against an average of 16.9% for cars of the same age – much better than average.
What goes wrong most often on the Mercedes-Benz GLS?+
Compared with the average car of the same age, testers find faults more often in these areas: plates and identification, wheels, body and structure, tyres.
More Mercedes-Benz models
Sources: anonymised MOT test results (DVSA) – contains public sector information licensed under the Open Government Licence v3.0; APK inspection defects (RDW, open data); Lithuanian roadworthiness test results (data.gov.lt). Initial tests only; retests are not counted. Photo: Alexander Migl, CC BY-SA 4.0, Wikimedia Commons (licence).