Should I buy a 2014 Mercedes-Benz B-Class 1.5 Diesel Automatic?

Explore common problems, estimated repair costs and practical checks for the 2014 Mercedes-Benz B-Class 1.5 Diesel Automatic. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.

Common problems

1High Likelihood

Automatic gearbox judder and hesitant pull-away

Jerky crawling, a pause before moving off, or rough low-speed shifts when warm.

How to check

Creep forward in traffic pace, then pull away gently several times after the car is warm.

Estimated Repair Cost

£1,200

2High Likelihood

EGR valve carbon fouling

Flat acceleration, uneven idle, warning light or intermittent limp mode.

How to check

Let it idle, then accelerate gently and again more firmly once warm.

Estimated Repair Cost

£450

3High Likelihood

Glow plugs and glow control module faults

Hard cold starts, rough first few seconds, warning light, smoke on startup or repeated regeneration trouble.

How to check

Start the car from fully cold if possible and let it idle for the first minute.

Estimated Repair Cost

£320

MOT Failure Rate

0%10%20%30%40%0–20,000 miles: 8.3% (274 failed / 3,283 tests)20,000–40,000 miles: 12.1% (1,802 failed / 14,839 tests)40,000–60,000 miles: 16.6% (2,567 failed / 15,418 tests)60,000–80,000 miles: 21.6% (2,424 failed / 11,211 tests)80,000–100,000 miles: 24.0% (1,497 failed / 6,233 tests)100,000–120,000 miles: 25.1% (717 failed / 2,854 tests)120,000–140,000 miles: 26.0% (296 failed / 1,140 tests)140,000–160,000 miles: 28.1% (122 failed / 434 tests)160,000–180,000 miles: 28.0% (40 failed / 143 tests)180,000–200,000 miles: 30.5% (18 failed / 59 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2014 Mercedes-Benz B-Class 1.5 Diesel Automatic

Mercedes-Benz B-Class buying questions

Is a 2014 Mercedes-Benz B-Class worth buying?

It can be, but only if the individual car backs it up. For the 2014 Mercedes-Benz B-Class 1.5 Diesel Automatic, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Mercedes-Benz B-Class (2014)?

The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.

What should I check before buying a Mercedes-Benz B-Class?

Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.

A model guide is useful. A report on its registration is better.

The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.

Or enter the vehicle manually