Used car guide

2015 Mercedes-Benz B-Class electric: common problems and MOT failures

What MOT testers find on the electric Mercedes-Benz B-Class first registered in 2015 (electric cars only): we looked at the 244 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

Small sample: there were only 244 MOTs of these cars during 2023–2025, so treat the percentages as rough. The known faults below don't depend on it.

244MOTs of 2015 electric cars, done in 2023–2025
82%pass first time (all 2015 cars: 74%)
5,400typical miles a year
34%had tyres flagged

Common 2015 Mercedes-Benz B-Class electric MOT failures and advisories

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

  • Tyres
    34% 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
    10% 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
    9% 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
    9% 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
    6% of testsRough price £15–£250

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

  • Driveshafts and joints
    5% of testsRough price £60–£350

    At the viewing: On full steering lock, drive slowly and listen for clicking from the front wheels.

Known faults on the 2015 Mercedes-Benz B-Class electric

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

Questions to ask the seller before buying a 2015 Mercedes-Benz B-Class electric

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

  1. Have all the recalls been done? Can a Mercedes dealer confirm from the VIN?
  2. Can I see the service history and receipts for any big jobs?

Looking at a Mercedes-Benz B-Class?

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

Other years

Every year of the Mercedes-Benz B-Class compared

YearMOT testsMost flagged
2026–Too new for MOT data
2025–Too new for MOT data
2024–Too new for MOT data
2023–Too new for MOT data
20221,424Tyres 19%
20213,631Tyres 20%
20208,747Tyres 23%
20191,758Tyres 24%
201811,521Tyres 29%
201716,941Tyres 30%
201615,928Tyres 31%
201424,593Tyres 32%
201321,133Tyres 32%
201217,251Tyres 31%
201110,635Brakes 40%
201013,626Brakes 42%
200913,002Brakes 47%
200810,481Brakes 50%
20078,076Brakes 48%
20066,099Brakes 49%
20051,264Brakes 48%

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 B-Class cars first registered in 2015. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score