Should I buy a 2017 Mercedes-Benz GLA-Class 2.1 Diesel Automatic?

Explore common problems, estimated repair costs and practical checks for the 2017 Mercedes-Benz GLA-Class 2.1 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

1Moderate Likelihood

Automatic gearbox mechatronic faults and drive loss

Jerky pull-away, delayed response, 'Reverse not possible' message, or the car dropping out of gear.

How to check

Pull away gently, stop, then select reverse and move off again after the gearbox is warm.

Estimated Repair Cost

£1,800

2Moderate Likelihood

EGR valve, cooler and intake soot build-up

Sluggish acceleration, rough idle, engine warning light, black smoke under load, or repeated emissions-related faults.

How to check

Accelerate gently and then more firmly from low revs once the engine is warm.

Estimated Repair Cost

£900

3Low Likelihood

Water pump and coolant leak faults

Coolant level dropping, sweet smell after a drive, dried pink/white residue in the engine bay, or rising temperature under load.

How to check

Warm the car fully, park it, and leave it idling briefly before switching off.

Estimated Repair Cost

£700

MOT Failure Rate

0%10%20%30%0–20,000 miles: 6.1% (379 failed / 6,234 tests)20,000–40,000 miles: 9.1% (2,164 failed / 23,710 tests)40,000–60,000 miles: 13.6% (2,915 failed / 21,385 tests)60,000–80,000 miles: 16.9% (2,005 failed / 11,834 tests)80,000–100,000 miles: 19.6% (926 failed / 4,715 tests)100,000–120,000 miles: 20.9% (306 failed / 1,462 tests)120,000–140,000 miles: 22.6% (101 failed / 446 tests)140,000–160,000 miles: 22.2% (30 failed / 135 tests)160,000–180,000 miles: 23.1% (12 failed / 52 tests)180,000–200,000 miles: 20.0% (2 failed / 10 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2017 Mercedes-Benz GLA-Class 2.1 Diesel Automatic

Mercedes-Benz GLA-Class buying questions

Is a 2017 Mercedes-Benz GLA-Class worth buying?

It can be, but only if the individual car backs it up. For the 2017 Mercedes-Benz GLA-Class 2.1 Diesel Automatic, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Mercedes-Benz GLA-Class (2017)?

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 GLA-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