The MOT Files

Make overview

Mercedes-Benz MOT pass rates by model

Data updated

Quick answer

Mercedes-Benz cars pass 77.1% of MOT tests across 1,726,066 recorded tests, against a national average of 72.3%. Of the 47 Mercedes-Benz models with MOT data, the GLE has the highest age-adjusted pass rate at 87.6% and the Citan the lowest at 65.2%. The item recorded most often on a failed Mercedes-Benz is tyre tread depth not in accordance with the requirements.

Tests analysed
1,726,066
Adjusted pass rate
76.7%
Models with data
47

Adjusted for age and mileage

Mercedes-Benz models ranked by pass rate

ModelAdjusted pass rateNational rankTests
Mercedes-Benz GLE87.6%11 of 26233,876
Mercedes-Benz GLC85.9%14 of 26284,268
Mercedes-Benz S-Class84.7%21 of 26225,269
Mercedes-Benz SL84.1%26 of 26220,815
Mercedes-Benz GLA82.3%35 of 26291,940
Mercedes-Benz CLA78.6%67 of 26276,197
Mercedes-Benz E-Class78.5%69 of 262230,225
Mercedes-Benz V-Class77.4%80 of 26213,442
Mercedes-Benz C-Class77.0%86 of 262358,975
Mercedes-Benz CLS76.4%93 of 26222,073
Mercedes-Benz Sprinter75.6%99 of 26224,345
Mercedes-Benz B-Class73.3%130 of 26270,795
Mercedes-Benz A-Class73.3%131 of 262365,510
Mercedes-Benz Vito71.0%161 of 26285,285
Mercedes-Benz SLK69.3%178 of 26254,151
Mercedes-Benz Citan65.2%221 of 26219,945

Unadjusted, not ranked

Other Mercedes-Benz models with MOT data

These models have at least 500 recorded tests, but their tested examples do not span enough ages and mileages to rank fairly. Their failure and advisory patterns are still drawn from real tests.

Across the range

What Mercedes-Benz cars fail on most

Share of failed Mercedes-Benz tests recording each item, summed across every model above.

  1. 1.Tyre tread depth not in accordance with the requirements15.5%

    Tyre worn close to the legal limit explained

  2. 2.A spring or spring component fractured or seriously weakened14.5%

    Road spring broken or fractured explained

  3. 3.A suspension pin, bush or joint excessively worn13.2%

    Suspension arm bush worn explained

  4. 4.A tyre seriously damaged10.2%

    Tyre damaged or deteriorated explained

  5. 5.A tyre cords visible or damaged10.0%

    Tyre ply or cord exposed, or the casing separating explained

  6. 6.a brake lining or pad worn below 1.5mm7.8%

    Brake drum or shoe worn or contaminated explained

Common questions

What is the MOT pass rate for Mercedes-Benz?
Across 1,726,066 recorded MOT tests, 77.1% of Mercedes-Benz tests ended in a pass, against a national average of 72.3%. Adjusted for the age and mileage of the cars tested, the figure is 76.7%. A make-level figure blends very different cars, so the individual model pages are the more useful comparison.
Which Mercedes-Benz is the most reliable on MOT evidence?
Of the Mercedes-Benz models with enough data to compare fairly, the GLE has the highest age-and-mileage-adjusted pass rate at 87.6%, ranking 11 of 262 models nationally. This reflects how often cars meet the MOT standard, not how often they break down.
What do Mercedes-Benz cars most often fail their MOT on?
The most commonly recorded failure item across Mercedes-Benz tests is "Tyre tread depth not in accordance with the requirements", appearing in 15.5% of failed tests. One failed test can list several items, so these shares do not add up to 100%.
Why do some Mercedes-Benz models not have a pass rate ranking?
A model is only ranked when its tested examples cover a wide enough spread of ages and mileages for a fair comparison. 16 of the 47 Mercedes-Benz models here qualify. For the rest we publish the unadjusted rate and the failure patterns, but not a rank, because comparing unadjusted rates mostly sorts cars by how new they are.

How to read these figures

Why the adjusted rate is the fair one

An unadjusted pass rate is strongly driven by the age and mileage of the cars being tested, not by how well they were built. A model bought mainly as a lightly used second car will look better than an identical car sold to high-mileage drivers. Adjusting for age and mileage compares each model against cars that have lived a similar life.

For a specific car, its own record beats any model average — check that vehicle’s MOT history and read what testers actually recorded against it.

Check any vehicle's MOT history

Free, instant, and straight from DVSA records. No sign-up.

Spaces are optional