Mercedes-Benz Clk MOT pass rate: 68.8% (24,967 tests, 2025)

The Mercedes-Benz Clk passed 68.8% of its 24,967 MOT tests in 2025 — 8.7 points below the UK average of 77.5%. The median tested example was 20 years old with 101,529 miles on the clock.
68.8%Pass rate (2025)
24,967MOT tests analysed
101,529 miMedian mileage at test
20 yrsMedian age at test

How the Clk compares

Mercedes-Benz Clk

68.8%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Mercedes-Benz average (all models)

80.7%

What fails most on the Mercedes-Benz Clk

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the Clk:

#SystemDefects recordedShare
1Suspension7,57732.5%
2Lamps, reflectors and electrical equipment4,65619.9%
3Brakes4,24418.2%
4Tyres2,46810.6%
5Noise, emissions and leaks1,4836.4%
6Visibility1,3055.6%

Pre-MOT checklist for Clk owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

  • Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
  • Walk round with all lights on: one blown bulb is the most avoidable fail there is
  • Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
  • Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
  • A blowing exhaust or visible smoke will fail; warm the engine fully before the test
Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

Clk pass rate by registration year

Lower age-adjusted outliers to inspect carefully: 2009. Strongest age-adjusted years: 2001. Full ranking and method: Mercedes-Benz Clk years to avoid.

Registration yearTestsPass rateVs same-ageMedian mileage
2001 3,999 74.7% +8.1 pts 99,251
2002 4,823 71.7% +6.1 pts 104,282
2003 8,746 69.5% +4.5 pts 103,162
2004 11,737 66.8% +2.5 pts 102,146
2005 11,731 67.3% +2.8 pts 104,069
2006 9,603 66.8% +2.4 pts 103,168
2007 11,034 66.0% +0.9 pts 102,520
2008 7,785 66.2% +1.1 pts 100,330
2009 8,628 65.2% -1.2 pts 93,910

Check a specific Clk before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Mercedes-Benz models

C78.2% pass rate · 343,551 tests A-Class77.8% pass rate · 232,671 tests E79.7% pass rate · 215,896 tests A89.1% pass rate · 93,733 tests Vito73.4% pass rate · 81,263 tests GLC87.2% pass rate · 65,847 tests GLA83.1% pass rate · 64,404 tests CLA82.7% pass rate · 62,279 tests

FAQs

What is the MOT pass rate for a Mercedes-Benz Clk?

In 2025, 68.8% of 24,967 first MOT tests on the Mercedes-Benz Clk were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Clk fail its MOT on most?

The biggest defect group is suspension (32.5% of its recorded defects), followed by lamps, reflectors and electrical equipment.

Is the Mercedes-Benz Clk reliable?

MOT pass rate is one lens on durability: at 68.8% it performs below the national average at a median age of 20 years and 101,529 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.