Should I buy a 2018 Mercedes-Benz CLA-Class 1.6 Petrol Automatic?

Explore common problems, estimated repair costs and practical checks for the 2018 Mercedes-Benz CLA-Class 1.6 Petrol 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

Jerky low-speed automatic shifting

Hesitation pulling away, a thump when selecting drive or reverse, or a jerky 2nd-to-1st downshift in traffic.

How to check

Creep in traffic pace, slow almost to a stop, then feed the throttle back in gently.

Estimated Repair Cost

£1,500

2Moderate Likelihood

Coolant leaks from tank or plastic cooling parts

Low coolant warning, sweet smell after a drive, dried pink or white residue in the engine bay, or the cooling fan running more than expected.

How to check

Warm the car fully, park it, and leave it idling for a minute before switching off.

Estimated Repair Cost

£650

3Moderate Likelihood

Battery drain and electrical glitches after damp ingress

Flat battery after standing, warning lights that come and go, erratic locking, or electronics behaving differently after rain.

How to check

Test the battery and charging system. Diagnose any remaining module or wiring faults.

Estimated Repair Cost

£700

MOT Failure Rate

0%10%20%30%40%50%0–20,000 miles: 9.4% (323 failed / 3,446 tests)20,000–40,000 miles: 13.2% (1,385 failed / 10,456 tests)40,000–60,000 miles: 16.5% (1,274 failed / 7,738 tests)60,000–80,000 miles: 19.6% (609 failed / 3,108 tests)80,000–100,000 miles: 19.9% (182 failed / 913 tests)100,000–120,000 miles: 22.4% (56 failed / 250 tests)120,000–140,000 miles: 20.8% (11 failed / 53 tests)140,000–160,000 miles: 0.0% (0 failed / 14 tests)160,000–180,000 miles: 42.9% (3 failed / 7 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2018 Mercedes-Benz CLA-Class 1.6 Petrol Automatic

Mercedes-Benz CLA-Class buying questions

Is a 2018 Mercedes-Benz CLA-Class worth buying?

It can be, but only if the individual car backs it up. For the 2018 Mercedes-Benz CLA-Class 1.6 Petrol Automatic, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Mercedes-Benz CLA-Class (2018)?

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 CLA-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