Motoring Today

Mercedes-Benz A-Class MOT reliability

Reliability from 24 Mercedes-Benz A-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 A-Class at MOT?

Across 12 Mercedes-Benz A-Class cars on Motoring Today, the average first-time MOT pass rate is 87%. 92% of stock currently holds a valid MOT, with a median of 8 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
87%
Valid MOT
11 / 12
Median MOT left
8 mo
Top failure
Tyres

There are currently 12 Mercedes-Benz A-Class models available on Motoring Today, with prices starting from £5,999 or a representative monthly payment of £185. Drawing on 247,367 real UK MOT tests, the Mercedes-Benz A-Class has a national MOT pass rate of 80.48%. While this reflects cars presented for testing rather than overall lifetime reliability, understanding common failure points can inform a purchase. The most frequent MOT failure category for the A-Class is Lighting & electrical, accounting for 25% of all recorded defects. This is followed by Tyres at 21%, Other defects at 17%, Brakes at 16%, and Visibility (windscreen & wipers) at 12%. For a used car buyer, these figures suggest key areas for scrutiny: check all lights (headlights, brake lights, indicators, fog lights) are working correctly and not clouded. Tyre condition, including tread depth and sidewall integrity, is crucial, as are brake disc and pad wear. Ensure wipers clear the screen effectively and there are no significant chips or cracks on the windscreen. It's important to remember that MOT failures often correlate with a vehicle's age and maintenance history, not solely the badge. Every listing on Motoring Today includes the full MOT history for transparency, allowing you to see how individual cars have performed over time.

87First-time MOT pass
Average pass rate
Stock with valid MOT
11 / 12
92% road-ready
Median MOT left
8 mo
Expiring < 2 mo
0
Plan for an MOT soon after purchase

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

Grouped reasons for MOT rejection across 24 Mercedes-Benz A-Class cars with DVSA test history in our stock (27 recorded failure items, 9 of them dangerous).

Failure areaRecorded failuresShare of failures
Tyres1348%
Brakes622%
Suspension27%
Visibility (windscreen & wipers)27%
Other27%
Drivetrain14%

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 A-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 A-Class?
Based on real national DVSA MOT tests, the Mercedes-Benz A-Class has a pass rate of 80.48% from 247367 tests conducted. This figure reflects cars presented for their MOT across the UK.
What are the most common MOT failures on a Mercedes-Benz A-Class?
The most frequent MOT failure categories for the Mercedes-Benz A-Class are Lighting & electrical at 25%, Tyres at 21%, and Brakes at 16%. Visibility (windscreen & wipers) also accounts for 12% of failures.
Is the Mercedes-Benz A-Class reliable?
An MOT pass rate of 80.48% indicates that the majority of Mercedes-Benz A-Class models presented for test pass. However, it's important to note that reliability for any used car can be influenced by its age, mileage, and maintenance history, with failures often clustering in older, less well-maintained vehicles.
What should I check before buying a used Mercedes-Benz A-Class?
Before purchasing a used Mercedes-Benz A-Class, pay close attention to the lighting and electrical systems, the condition of the tyres, and the brakes. Also, inspect the windscreen and wipers, as these are common MOT failure areas.
How many Mercedes-Benz A-Class cars are for sale now and what's the cheapest price?
There are 6 Mercedes-Benz A-Class cars for sale now, with the cheapest available from £8999. A representative finance example shows monthly payments from £207, subject to status. This information was updated on 1 August 2026.
What are the most common MOT failures on the Mercedes-Benz A-Class?
Across 24 Mercedes-Benz A-Class cars on Motoring Today with DVSA MOT history, the most common reasons for MOT failure are tyres, brakes and suspension (tyres account for 48% of recorded failures).

More Mercedes-Benz A-Class resources