Used car guide

2015 Mercedes-Benz CLS petrol: common problems and MOT failures

What MOT testers find on the petrol Mercedes-Benz CLS first registered in 2015 (petrol cars only): we looked at the 516 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

516MOTs of 2015 petrol cars, done in 2023–2025
83%pass first time (all 2015 cars: 74%)
6,800typical miles a year
23%had tyres flagged

Common 2015 Mercedes-Benz CLS petrol MOT failures and advisories

The share of 2015 Mercedes-Benz CLS petrol MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • 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.

  • Brakes
    14% 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.

  • Suspension
    8% 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
    5% of testsRough price £10–£80

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

  • Wipers, windscreen and mirrors
    3% of testsRough price £15–£250

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

  • Oil and fluid leaks
    3% 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.

Questions to ask the seller before buying a 2015 Mercedes-Benz CLS petrol

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

  1. Can I see the service history and receipts for any big jobs?

Looking at a Mercedes-Benz CLS?

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Other years

Every year of the Mercedes-Benz CLS compared

YearMOT testsMost flagged
2023–Too new for MOT data
2022–Too few tests
2021104Tyres 21%
2020850Tyres 24%
20193,235Tyres 25%
20182,895Tyres 26%
20174,487Tyres 31%
20166,312Tyres 31%
20145,369Brakes 35%
20139,199Brakes 38%
20123,346Brakes 34%
20113,528Brakes 34%
20103,201Brakes 37%
20093,285Brakes 38%
20084,060Brakes 38%
20075,119Brakes 41%
20064,213Brakes 40%
20052,811Brakes 35%

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Mercedes-Benz CLS cars first registered in 2015. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score