Used car guide

2020 Mercedes-Benz EQC 400 AMG Line 4MATIC: common problems and what to check

What gets flagged at MOT on 2020 Mercedes-Benz EQC 400 AMG Line 4MATICs, from 1,516 tests in 2025, plus known faults and what to look at before you buy one.

1,516MOT tests in 2025
85%pass first time (all 2020 cars: 86%)
9,400typical miles a year
1.9×the usual rate for tread depth

What stands out

Parts flagged at MOT more often on 2020 Mercedes-Benz EQC 400 AMG Line 4MATICs than on all cars registered in 2020.

  • Tread depth1.9× usual
    Mercedes-Benz EQC 400 AMG Line 4MATIC
    30% All 2020 cars
    16%

    Failed outright at MOT: 0.9%, against 1.5% of all 2020 cars. The rest were advisories or minor defects.

    Rough price £70–£150 our estimate

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

  • Ball joint16.7× usual
    Mercedes-Benz EQC 400 AMG Line 4MATIC
    10% All 2020 cars
    0.6%

    Failed outright at MOT: 3.6%, against 0.2% of all 2020 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

Brake discs: 2.4% here, against 9% of all 2020 cars.

By area

The share of 2020 Mercedes-Benz EQC 400 AMG Line 4MATIC MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    36% 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.

  • Suspension
    11% 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.

  • Seats and seatbelts
    5% of testsRough price £80–£250

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

  • Wipers, windscreen and mirrors
    4% of testsRough price £15–£250

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

  • Brakes
    4% 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.

  • Lights and electrics
    2% of testsRough price £10–£80

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

Looking at a Mercedes-Benz EQC 400 AMG Line 4MATIC?

Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.

Other years

YearMOT testsMost flagged
20221,276Tyres 39%
20211,442Tyres 32%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2020 Mercedes-Benz EQC 400 AMG Line 4MATICs registered in 2020. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score