Used car guide

1998 Mercedes-Benz CLK: common problems and what to check

What gets flagged at MOT on 1998 Mercedes-Benz CLKs, from 186 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 186 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

186MOT tests in 2025
66%pass first time (all 1998 cars: 66%)
3,500typical miles a year
38%had suspension flagged

What gets flagged at MOT

The share of 1998 Mercedes-Benz CLK MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    38% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Lights and electrics
    37% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Brakes
    32% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Tyres
    23% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Oil and fluid leaks
    22% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Wipers, windscreen and mirrors
    12% of testsRough price £15–£250

    At the viewing: Check for chips in the driver's view, and test the wipers and washers.

Looking at a Mercedes-Benz CLK?

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Other years

YearMOT testsMost flagged
20092,745Suspension 46%
20082,454Suspension 48%
20073,399Suspension 50%
20062,832Suspension 47%
20053,419Suspension 48%
20043,442Suspension 49%
20032,433Suspension 45%
20021,331Brakes 42%
20011,121Brakes 37%
2000949Brakes 40%
1999698Suspension 38%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 1998 Mercedes-Benz CLKs registered in 1998. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score