Should I buy a 2016 Mercedes-Benz CLA-Class 2.1 Diesel Automatic?

Explore common problems, estimated repair costs and practical checks for the 2016 Mercedes-Benz CLA-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

1High Likelihood

AdBlue / NOx sensor SCR faults

Engine light, AdBlue warnings, 'cannot measure level' messages, stop/start staying unavailable, or a restart countdown.

How to check

Start the car from cold, let it idle, then drive until fully warm and watch the dash for emissions or restart warnings.

Estimated Repair Cost

£900

2Moderate Likelihood

DPF loading and failed regenerations

DPF or engine warning light, cooling fan running after shutdown, reduced performance, or repeated requests for longer drives.

How to check

Drive the car until warm, then hold a steady cruise and watch for warning lights, limp mode, or unusually reluctant acceleration.

Estimated Repair Cost

£900

3High Likelihood

Injector seal leak ('black death')

Diesel smell, ticking or chuffing from the engine bay, and black crusty deposits around the injectors.

How to check

Start from cold with the bonnet open before the drive, then let it idle for a minute and stand near the front of the car.

Estimated Repair Cost

£500

MOT Failure Rate

0%10%20%30%40%0–20,000 miles: 10.3% (187 failed / 1,814 tests)20,000–40,000 miles: 12.0% (1,259 failed / 10,458 tests)40,000–60,000 miles: 15.4% (2,002 failed / 12,976 tests)60,000–80,000 miles: 18.2% (2,013 failed / 11,054 tests)80,000–100,000 miles: 20.1% (1,403 failed / 6,967 tests)100,000–120,000 miles: 21.2% (702 failed / 3,319 tests)120,000–140,000 miles: 21.8% (300 failed / 1,379 tests)140,000–160,000 miles: 21.4% (107 failed / 499 tests)160,000–180,000 miles: 20.7% (35 failed / 169 tests)180,000–200,000 miles: 32.2% (19 failed / 59 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2016 Mercedes-Benz CLA-Class 2.1 Diesel Automatic

Mercedes-Benz CLA-Class buying questions

Is a 2016 Mercedes-Benz CLA-Class worth buying?

It can be, but only if the individual car backs it up. For the 2016 Mercedes-Benz CLA-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 CLA-Class (2016)?

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