Motoring Today

Mercedes-Benz C-Class MOT reliability

Reliability from 13 Mercedes-Benz C-Class cars with real DVSA MOT history — how often they pass first time, the most common failure reasons, and how much MOT life is left.

Reviewed by the Motoring Today Editorial team · methodology in our editorial standards.

How reliable is the Mercedes-Benz C-Class at MOT?

Across 5 Mercedes-Benz C-Class cars on Motoring Today, the average first-time MOT pass rate is 75%. 80% of stock currently holds a valid MOT, with a median of 4 months left on the certificate. The most common reasons these cars fail an MOT are tyres, brakes and suspension, from real DVSA test history.

Avg pass rate
75%
Valid MOT
4 / 5
Median MOT left
4 mo
Top failure
Tyres

There are 5 Mercedes-Benz C-Class models currently available on Motoring Today, with prices starting from £12,999 or a representative monthly finance example of £299. Based on DVSA MOT test data from 41 real UK tests, the C-Class achieves a national MOT pass rate of 70.73%. However, this figure reflects vehicles presented for test, not lifetime reliability, and failure rates often correlate with a car's age and how well it has been maintained, rather than being an inherent flaw of the model itself. The most common MOT failure categories for the Mercedes-Benz C-Class are Suspension, accounting for 29% of failures, followed by Lighting & electrical at 26%, and Brakes at 19%. For someone considering a used C-Class, this data highlights key areas to scrutinise during a pre-purchase inspection. Suspension issues could mean worn bushes, shock absorbers, or springs, affecting ride comfort and handling. Lighting and electrical problems might range from simple bulb failures to more complex wiring issues, while brake failures often relate to worn pads, discs, or fluid leaks. Checking these areas thoroughly before purchase, or having a professional inspection, can help identify potential issues. While this data offers valuable insight into common points of concern, remember that every used car's condition is unique. Motoring Today provides full MOT history for each listing, giving you transparency into its past test results.

75First-time MOT pass
Average pass rate
Stock with valid MOT
4 / 5
80% road-ready
Median MOT left
4 mo
Expiring < 2 mo
1
Plan for an MOT soon after purchase

Most common MOT failures on the Mercedes-Benz C-Class

Grouped reasons for MOT rejection across 13 Mercedes-Benz C-Class cars with DVSA test history in our stock (21 recorded failure items, 11 of them dangerous).

Failure areaRecorded failuresShare of failures
Tyres1571%
Brakes210%
Suspension210%
Lighting & electrical15%
Other15%

Based on real DVSA MOT test records for cars currently listed. Individual condition varies — always check the specific car's MOT history and advisories on its listing.

MOT pass rate is the percentage of Mercedes-Benz C-Class cars in our stock that passed their most recent MOT on the first attempt, based on DVSA history. A pass rate above 80% is generally strong for a car of this age.

If a car you're viewing is approaching its MOT expiry, factor in the cost of any advisories — these are listed on each vehicle detail page.

Frequently asked questions

What is the MOT pass rate for a used Mercedes-Benz C-Class?
Based on 41 real national DVSA MOT tests, the Mercedes-Benz C-Class has an average pass rate of 70.73%.
What are the most common MOT failures on a Mercedes-Benz C-Class?
The most common MOT failure categories for the Mercedes-Benz C-Class are Suspension at 29%, Lighting & electrical at 26%, and Brakes at 19%.
Is the Mercedes-Benz C-Class reliable?
An MOT pass rate reflects the condition of cars presented for test, not necessarily their overall lifetime reliability. Failures typically cluster with a vehicle's age and how well it has been maintained, rather than being solely indicative of inherent reliability issues.
What should I check before buying a used Mercedes-Benz C-Class?
Before purchasing, pay close attention to the suspension, all lighting and electrical components, and the braking system, as these are the most common MOT failure areas for the Mercedes-Benz C-Class.
How many Mercedes-Benz C-Class cars are for sale now and what's the cheapest price?
There are 6 Mercedes-Benz C-Class cars currently for sale. The cheapest available is priced at £12,290, or from £299 per month. This is a representative example and finance is subject to status. Last updated: 5 October 2026.
What are the most common MOT failures on the Mercedes-Benz C-Class?
Across 13 Mercedes-Benz C-Class cars on Motoring Today with DVSA MOT history, the most common reasons for MOT failure are tyres, brakes and suspension (tyres account for 71% of recorded failures).

More Mercedes-Benz C-Class resources