Should I buy a 2019 Mercedes-Benz A-Class 1.5 Diesel Automatic W177?

Explore common problems, estimated repair costs and practical checks for the 2019 Mercedes-Benz A-Class 1.5 Diesel Automatic W177. 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 hesitation, shunt or limp mode

Jerky pull-away, delayed engagement when selecting drive or reverse, harsh low-speed shifts, or a gearbox warning with restricted gears.

How to check

Start from cold, select drive and reverse a few times, then crawl in traffic pace and pull away gently from a stop.

Estimated Repair Cost

£900

2Moderate Likelihood

AdBlue / NOx sensor SCR faults

Engine light, AdBlue or emissions warning, restart countdown, stop-start not working properly, or reduced power.

How to check

Start the car, let it idle, then drive until warm while watching for emissions messages and stop-start behaviour.

Estimated Repair Cost

£700

3Moderate Likelihood

MBUX screen freezes and electrical glitches

Screen freezing, random reboots, missing audio, laggy menus, warning messages that clear after restart, or features that stop responding intermittently.

How to check

Use navigation, media, Bluetooth and steering-wheel controls during a short drive and after a restart.

Estimated Repair Cost

£400

MOT Failure Rate

0%10%20%30%0–20,000 miles: 7.9% (489 failed / 6,195 tests)20,000–40,000 miles: 11.5% (2,831 failed / 24,571 tests)40,000–60,000 miles: 14.4% (2,658 failed / 18,476 tests)60,000–80,000 miles: 15.9% (1,229 failed / 7,729 tests)80,000–100,000 miles: 17.6% (446 failed / 2,533 tests)100,000–120,000 miles: 16.5% (102 failed / 618 tests)120,000–140,000 miles: 19.1% (34 failed / 178 tests)140,000–160,000 miles: 13.8% (9 failed / 65 tests)160,000–180,000 miles: 28.6% (6 failed / 21 tests)180,000–200,000 miles: 25.0% (1 failed / 4 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2019 Mercedes-Benz A-Class 1.5 Diesel Automatic W177

Mercedes-Benz A-Class buying questions

Is a 2019 Mercedes-Benz A-Class worth buying?

It can be, but only if the individual car backs it up. For the 2019 Mercedes-Benz A-Class 1.5 Diesel Automatic W177, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Mercedes-Benz A-Class (2019)?

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 A-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