Used car guide

2015 Mercedes-Benz GLC: common problems and what to check

What gets flagged at MOT on 2015 Mercedes-Benz GLCs, from 1,312 tests in 2025, plus known faults and what to look at before you buy one.

1,312MOT tests in 2025
83%pass first time (all 2015 cars: 72%)
8,400typical miles a year
3.1×the usual rate for ball joint

What stands out

Parts flagged at MOT more often on 2015 Mercedes-Benz GLCs than on all cars registered in 2015.

  • Ball joint3.1× usual
    Mercedes-Benz GLC
    11.2% All 2015 cars
    3.6%

    Failed outright at MOT: 3.9%, against 1.9% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £60–£150 (one joint) ClickMechanic

    At the viewing: Listen for knocking over bumps and check the rubber boots behind the wheels aren't split.

Better than most

Tyre condition: 6.5% here, against 13.4% of all 2015 cars.

By area

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

  • Tyres
    26% 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
    20% 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
    17% 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.

  • Wipers, windscreen and mirrors
    6% of testsRough price £15–£250

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

  • Seats and seatbelts
    4% of testsRough price £80–£250

    At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

  • Lights and electrics
    3% of testsRough price £10–£80

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

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Other years

YearMOT testsMost flagged
20227,144Tyres 26%
20216,537Tyres 25%
202011,103Tyres 25%
201917,168Tyres 26%
201818,893Tyres 27%
201712,478Tyres 27%
20169,086Tyres 27%

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