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MOT History from tests of petrol MERCEDES BENZ B-CLASSs year 2020

Review the list of common MERCEDES BENZ B-CLASS failures below or to perform a specific mot history check on your MERCEDES BENZ then use our popular KnowYourCar service

mot history
Pass percent:94.49%
(The average a petrol MERCEDES BENZ B-CLASS year 2020 passes without issue)
Based on:4,049 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment71
Windscreen wiper does not clear the windscreen effectively68
Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))11
Registration plate issues6
Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))5
Parking brake efficiency below requirements (1.4.2 (a) (i))4
Windscreen washer not working 3
Nearside Front Headlamp insecure (4.1.1 (c))3
Nearside Rear Shock absorbers has a serious fluid leak3
Nearside Front Road wheel fixing missing (5.2.1 (a) (i))3
Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))2
Offside Front Coil spring fractured or broken (5.3.1 (b) (i))2
Nearside Rear Seat belt buckle missing (7.1.2 (d))2
Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))2
Horn not working (7.7 (a))2
Offside Rear Seat belt buckle not functioning as intended will not fasten (7.1.2 (d))1
Rear Service brake excessively fluctuating (1.2.1 (e))1
Nearside Front Shock absorbers has a serious fluid leak1
Offside Front Shock absorbers has a serious fluid leak1
Offside Headlamp insecure (4.1.1 (c))1
Nearside Side repeater not working (4.4.1 (a) (ii))1
Nearside Front Road wheel fixing missing 1x wheel bolt missing (5.2.1 (a) (i))1
Horn sound not in accordance with requirements (7.7 (c))1
Front Brake disc significantly and obviously worn (1.1.14 (a) (i))1
Nearside Headlamp cleaning device for LED or HID headlamp inoperative (4.1.6 (a) (ii))1
Offside Headlamp cleaning device for LED or HID headlamp inoperative (4.1.6 (a) (ii))1
Nearside Front Road wheel fixing missing 1 x wheel bolt (5.2.1 (a) (i))1
Nearside Front Seat belt webbing significantly weakened cut from edge greater than 2mm (7.1.2 (b))1
Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))1
Exhaust has a major leak of exhaust gases Rear silencer split excessively (6.1.2 (a))1
Exhaust emissions likely to be affected by an exhaust leak (8.2.1.1 (b))1
Offside Front Obligatory mirror insecure (3.3 (b) (ii))1
Offside Front Seat belt installation has cut and/or reworked original webbing (10.1 (a))1
Nearside Rear Outer Seat belt buckle not functioning as intended (7.1.2 (d))1
Offside Rear Outer Seat belt buckle not functioning as intended (7.1.2 (d))1
Registration plate lamp issues1
Nearside Front Upper Anti-roll bar ball joint dust cover no longer prevents the ingress of dirt droplink (5.3.4 (b) (ii))1
Nearside Inner Fuel pipe damaged (6.1.3 (c) (ii))1
Offside Side repeater not working (4.4.1 (a) (ii))1
Brake pedal anti-slip provision loose Brake pedal rubber anti-slip was not secure. (1.1.2 (c))1
Nearside Rear Seat belt webbing significantly weakened cut from edge greater than 2mm (7.1.2 (b))1
Offside Parking brake inoperative on one side (1.4.1 (a))1
Offside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))1
Nearside Windscreen wiper not working (3.4 (a))1
Offside Windscreen wiper not working (3.4 (a))1
Central Rear Seat belt not functioning as intended jammed behind seat (7.1.2 (c))1
Nearside Front Headlamp incorrect colour (4.1.4 (a))1
Nearside Front Headlamp are incorrectly positioned (4.1.4 (a))1
Brake fluid contaminated (1.8 (a))1
Offside Rear Seat belt buckle not functioning as intended (7.1.2 (d))1
Offside Front Seat belt buckle not functioning as intended (7.1.2 (d))1
Offside Rear Seat belt not functioning as intended (7.1.2 (c))1
Front Headlamp levelling device inoperative (4.1.5 (a))1
Offside Side repeater not working door mirror (4.4.1 (a) (ii))1
Nearside Front Track rod end ball joint has excessive play (2.1.3 (b) (i))1
Nearside Rear Anti-roll bar linkage ball joint likely to become detached (5.3.4 (a) (ii))1
Nearside Front Coil spring fractured or broken (5.3.1 (b) (i))1
Emissions not tested (8.2.1.2 (d))1
Electronic braking system warning device indicates a fault (1.7 (b))1
Nearside Rear Outer Seat belt installation causes a seat belt component fitted to a seat to significantly intrude into a gangway and likely to injure a passenger belt buckle does not lock (10.1 (v))1
Offside Rear Outer Seat belt installation causes a seat belt component fitted to a seat to significantly intrude into a gangway and likely to injure a passenger seat belt buckle does not lock (10.1 (v))1
Offside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i))1
Nearside Front Anti-roll bar ball joint excessively worn (5.3.4 (a) (i))1
Central Rear Seat belt buckle not functioning as intended (7.1.2 (d))1
Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))1
Nearside Front Anti-roll bar linkage fractured (5.3.3 (b) (ii))1
Nearside Rear Seat belt buckle not functioning as intended (7.1.2 (d))1
Offside Rear Shock absorbers has a serious fluid leak1
Windscreen in an unacceptable condition (3.2 (c) (i))1
Nearside Rear Hydraulic brake calliper inadequately mounted and braking performance affected (1.1.16 (c) (ii))1
Rear Brake lining(s) less than 1.5 mm thick (1.1.13 (a) (ii))1
Offside Front Windscreen wiper not working (3.4 (a))1
Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))1
Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii))1

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

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