Diesel Mercedes-Benz Clk: MOT pass rate

61.7% of diesel Mercedes-Benz Clks pass the MOT first time, measured across 5,502 DVSA tests on that fuel type alone. Average mileage at test was 126,956.

Diesel against the other Mercedes-Benz Clk versions

Why the fuel type changes the number

Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.

On the Mercedes-Benz Clk specifically, petrol is the strongest at 69.6%, and this diesel version sits 6.4 points below the 68.1% model average.

What it means if you are buying one

The diesel Mercedes-Benz Clk fails more often than the model average, so budget for the items that catch this fuel type and treat a fresh MOT as worth paying for. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.

Mileage is part of the answer

The average diesel Mercedes-Benz Clk had covered 126,956 miles at test, against 99,547 for the petrol. That is high mileage, so timing belts, clutches, suspension bushes and corrosion are the items worth budgeting for rather than the MOT itself.

Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Mercedes-Benz Clk page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Mercedes-Benz Clk

1. Smoke opacity levels exceed the manufacturer's specified limit, 2.3% of tests (8.52x the national rate for this defect)
2. Brake pipe damaged or excessively corroded, 5.8% of tests (5.45x the national rate for this defect)
3. A suspension pin, bush or joint excessively worn, 25.3% of tests (5.04x the national rate for this defect)
4. A spring or spring component fractured or seriously weakened, 9.4% of tests (4.13x the national rate for this defect)
5. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 6.6% of tests (3.57x the national rate for this defect)
6. Parking brake efficiency below minimum requirement, 4.2% of tests (3.21x the national rate for this defect)
7. The aim of a headlamp is not within limits laid down in the requirements, 7% of tests (2.99x the national rate for this defect)
8. A steering ball joint with excessive wear or free play, 3.8% of tests (2.9x the national rate for this defect)
9. Significant brake effort recorded with no brake applied indicating a binding brake, 2.7% of tests (2.57x the national rate for this defect)
10. Exhaust system leaking or insecure, 2.5% of tests (2.47x the national rate for this defect)

From 5,557 DVSA-tracked diesel Mercedes-Benz Clk tests, 2024, split out from the Mercedes-Benz Clk's other fuel types. DVSA testers marked 4.77% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.

Most common MOT advisories on a diesel Mercedes-Benz Clk

Flagged but doesn't fail the car, a different list from the failures above.

1. A flexible brake hose excessively damaged, deteriorated, chafed, twisted or stretched, 9.9% of tests (17.72x the national rate for this defect)
2. A wheel bearing with excessive play, 10% of tests (15.36x the national rate for this defect)
3. Brake pipe damaged or excessively corroded, 46.7% of tests (7.54x the national rate for this defect), also fails
4. Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 5.1% of tests (4.57x the national rate for this defect)
5. A suspension pin, bush or joint excessively worn, 39.4% of tests (2.95x the national rate for this defect), also fails
6. A steering ball joint with excessive wear or free play, 3.9% of tests (2.95x the national rate for this defect), also fails
7. A suspension component excessively damaged or corroded, 13.4% of tests (2.6x the national rate for this defect)
8. A spring or spring component fractured or seriously weakened, 8.5% of tests (1.8x the national rate for this defect), also fails
9. Number plate inscription missing or illegible, 4.8% of tests (1.8x the national rate for this defect)
10. Exhaust system leaking or insecure, 4.6% of tests (1.62x the national rate for this defect), also fails

From 5,557 DVSA-tracked diesel Mercedes-Benz Clk tests, 2024.

Other Mercedes-Benz Clk fuel types

• Petrol Mercedes-Benz Clk - 69.6%

All Mercedes-Benz Clk MOT data · Every model