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Audi A4 vs Mercedes C-Class

Both are saloons & estates. First-time MOT failure at age 7, and what each one is known to fail on.

The Mercedes C-Class is the more reliable of the two. It fails its first MOT at age 7 17.5% of the time, against 20.6% for the Audi A4.

Audi A4

20.6%

fail at age 7

Rank 154 of 239 · 73k miles at 7 · 178,525 tests

Mercedes C-Class

17.5%

fail at age 7

Rank 104 of 239 · 65k miles at 7 · 293,182 tests

What each one fails on

Measured

The faults each records most at ages 6 to 9. Same figures as each full report.

A suspension pin, bush or joint excessively wornAdvisory19.2%

A spring or spring component fractured or seriously weakenedFail7.5%

A spring or spring component fractured or seriously weakenedAdvisory3.3%

A shock absorber damaged to the extent that it does not function or showing signs of severe leakageAdvisory2.8%

A suspension pin, bush or joint excessively wornFail1.8%

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etcFail1.3%

A suspension pin, bush or joint excessively wornAdvisory8.1%

A suspension pin, bush or joint excessively wornFail3.0%

A spring or spring component fractured or seriously weakenedFail2.6%

Engine MIL illuminated indicating a malfunctionFail2.5%

A transmission shaft flexible coupling excessively deterioratedAdvisory1.2%

A shock absorber damaged to the extent that it does not function or showing signs of severe leakageAdvisory0.9%