Motoring Today

Mercedes-Benz A-Class MOT reliability

Reliability from 36 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 10 Mercedes-Benz A-Class cars on Motoring Today, the average first-time MOT pass rate is 76%. 90% 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 other, from real DVSA test history.

Avg pass rate
76%
Valid MOT
9 / 10
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 £9,295, or a representative monthly payment of £216. Based on 247,000 real UK MOT tests, the Mercedes-Benz A-Class achieves a national DVSA MOT pass rate of 80.48%. While this reflects cars presented for test rather than lifetime reliability, common failure categories can offer insight. The most frequent MOT failure for the A-Class is 'Lighting & electrical', accounting for 25% of all faults. This is closely followed by 'Tyres' at 21%, 'Other' at 17%, 'Brakes' at 16%, and 'Visibility (windscreen & wipers)' at 12%. For a used car buyer, this highlights areas to scrutinise. For instance, 'Lighting & electrical' issues might indicate faulty bulbs, wiring problems, or even sensor malfunctions. 'Tyres' failures typically relate to insufficient tread depth or damage, while 'Brakes' could mean worn pads or discs. 'Visibility' failures often involve worn wiper blades or screen damage. These common failure points suggest practical checks before purchase: ensure all lights work, inspect tyre condition and tread, check for smooth and effective braking, and verify wipers clear the screen effectively. Remember that MOT failures often cluster with a vehicle's age and how well it has been maintained, rather than being inherent to the badge itself.

76First-time MOT pass
Average pass rate
Stock with valid MOT
9 / 10
90% 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 36 Mercedes-Benz A-Class cars with DVSA test history in our stock (48 recorded failure items, 20 of them dangerous).

Failure areaRecorded failuresShare of failures
Tyres2144%
Brakes1327%
Other510%
Suspension36%
Visibility (windscreen & wipers)36%
Drivetrain24%

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 247367 national DVSA MOT tests, the Mercedes-Benz A-Class has a pass rate of 80.48%. This figure reflects real-world test results across the UK.
What are the most common MOT failures on a Mercedes-Benz A-Class?
The most frequent failure categories for the A-Class are Lighting & electrical at 25%, Tyres at 21%, Other at 17%, Brakes at 16%, and Visibility (windscreen & wipers) at 12%.
Is the Mercedes-Benz A-Class reliable?
An MOT pass rate reflects cars presented for test, not necessarily lifetime reliability. Issues often cluster with a vehicle's age and general maintenance. While the A-Class has a pass rate of 80.48%, consistent servicing and good care are key to long-term reliability.
What should I check before buying a used Mercedes-Benz A-Class?
Focus on common MOT failure areas. Thoroughly inspect all lights and electrical systems, the condition and tread depth of the tyres, the brakes for wear, and the windscreen and wipers for any damage or defects.
How many Mercedes-Benz A-Class models are for sale now and what's the cheapest price?
Currently, there are 13 Mercedes-Benz A-Class models available for sale. The cheapest price starts from £8495, with monthly finance options from £190 as a representative example, subject to status.
What are the most common MOT failures on the Mercedes-Benz A-Class?
Across 36 Mercedes-Benz A-Class cars on Motoring Today with DVSA MOT history, the most common reasons for MOT failure are tyres, brakes and other (tyres account for 44% of recorded failures).

More Mercedes-Benz A-Class resources