Mercedes-Benz Reliability UK 2026

How reliable is a Mercedes-Benz? Here’s a data-led reliability profile based on first-time MOT pass rates, model-level breakdown, top failure categories, and a buyer’s verdict.

By Bertram Sargla, Founder, MOT CheckupLast updated: 2026-05-16Data sourced from DVSA

Mercedes-Benz reliability snapshot: first-time MOT pass rate 80.9% (+16.9 pp vs the UK average of 64%). Across 22 Mercedes-Benz models, the typical dangerous-defect rate is 1.66% and the average retest rate is 13.1%. Mercedes-Benz sits well above the UK average on first-time MOT performance. For a buyer focused on long-term reliability, it's a solid badge — though individual mileage and service history still matter more than brand.

Mercedes-Benz first-time MOT pass rate

80.9%

Implied failure rate: 19.1% · UK average pass rate: 64%

vs UK average

+16.9 pp

Dangerous defects

1.66%

Retest rate

13.1%

How Mercedes-Benz compares to the UK average

The UK national first-time MOT pass rate is 64%, with about 36% of cars failing on the first attempt.Mercedes-Benz’s pass rate of 80.9% is 16.9 percentage points above that benchmark. That ’s a brand-average figure — individual Mercedes-Benz models range from the high 60s to above 90%, so model and age matter more than the badge.

Mercedes-Benz pass rate80.9%

UK average pass rate64%

Most reliable Mercedes-Benz models

Ranked by first-time MOT pass rate across our reliability dataset. Restricted to models with meaningful sample size.

Mercedes-Benz EQA

2021–present · sample ≈4k

90%

Mercedes-Benz EQB

2021–present · sample ≈4k

89.8%

Mercedes-Benz EQC

2019–present · sample ≈3k

89.5%

Most problematic Mercedes-Benz models

The Mercedes-Benz models in our dataset with the lowest first-time MOT pass rates. A low pass rate doesn’t mean a bad car — older platforms naturally accumulate wear faster — but it does mean a pre-purchase MOT history check is essential.

Mercedes-Benz Sprinter

2000–present · sample ≈32k

73.2%

Mercedes-Benz Vito

2003–present · sample ≈22k

74.5%

Mercedes-Benz V-Class

2014–present · sample ≈8k

77.5%

Run a free MOT check on a specific Mercedes-Benz

Brand averages set expectations — a single car’s history is what actually decides whether it’s worth buying.

Free instant MOT history check at /free-mot-check.

Top MOT failure categories for Mercedes-Benz

Aggregated across 22 Mercedes-Benz models in our dataset, weighted by sample size.

Lamps, reflectors and electrical equipment

15%

Suspension

14.2%

Brakes

12.3%

Tyres

9.9%

Exhaust, fuel and emissions

8.1%

Mercedes-Benz reliability — FAQ

Is Mercedes-Benz a reliable car brand in the UK?

Mercedes-Benz's first-time MOT pass rate of 80.9% is above the UK national average of 64%, putting it in the stronger half of brands for MOT reliability. We track 22 Mercedes-Benz models in our dataset.

What is the most reliable Mercedes-Benz model for MOT?

Based on first-time MOT pass rates, the most reliable Mercedes-Benz models in our dataset are: Mercedes-Benz EQA (90%), Mercedes-Benz EQB (89.8%), Mercedes-Benz EQC (89.5%). Newer EV variants tend to score highest because they avoid emissions-related failures entirely.

Which Mercedes-Benz models fail their MOT most often?

In our dataset, the Mercedes-Benz models with the lowest first-time MOT pass rates are: Mercedes-Benz Sprinter (73.2%), Mercedes-Benz Vito (74.5%), Mercedes-Benz V-Class (77.5%). These tend to be older or higher-mileage models; the same name in a newer year often performs noticeably better.

What are the most common MOT failures on a Mercedes-Benz?

Aggregated across Mercedes-Benz models, the most common MOT failure categories are: lamps, reflectors and electrical equipment (15%), suspension (14.2%), brakes (12.3%). These align with the national pattern; lighting, suspension, and tyre defects dominate UK MOT failures across most brands.

Check a Mercedes-Benz’s MOT history

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Source: MOT Checkup analysis of DVSA MOT test data. Brand-average pass rate is sample-size weighted across 22 Mercedes-Benz models in our dataset. Individual cars vary considerably — always check the specific registration’s MOT history before buying.