>

MOT History from tests of petrol MERCEDES BENZ 420s year 1987

Review the list of common MERCEDES BENZ 420 failures below or to perform a specific mot history check on your MERCEDES BENZ then use our popular KnowYourCar service

mot history
Pass percent:74.52%
(The average a petrol MERCEDES BENZ 420 year 1987 passes without issue)
Based on:5,103 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment357
Windscreen wiper does not clear the windscreen effectively181
Brake pipe excessively corroded135
Registration plate lamp issues117
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|114
Parking brake: efficiency below requirements |3.7.B.7|88
Brakes imbalanced across an axle63
Rear brake binding58
Registration plate issues57
Rear parking brake recording little or no effort50
Brake hose excessively deteriorated43
Anti-lock braking system warning lamp indicates an ABS fault43
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|36
Exhaust has a major leak of exhaust gases |7.1.2|35
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|35
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|32
Hazard warning switch faulty |1.4.B.1d|30
Offside Rear fog lamp not working |1.3.2b|30
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|30
Offside front brake binding |3.7.B.1|28
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|28
Centre Exhaust has a major leak of exhaust gases |7.1.2|24
Nearside Front position lamp|s| not working |1.1.A.3b|23
Offside Front position lamp|s| not working |1.1.A.3b|22
Front Exhaust has a major leak of exhaust gases |7.1.2|21
Offside Stop lamp not working |1.2.1b|21
Nearside front brake binding |3.7.B.1|21
Parking brake lever has no reserve travel |3.1.6b|18
Rear Exhaust system not adequately supported |7.1.1|16
Nearside Stop lamp not working |1.2.1b|16
Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|15
Exhaust engine idle speed too high |7.3.A.2a|15
Offside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|15
Rear fog lamp not working |1.3.2b|14
Offside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|14
Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|13
Direction indicators not working |1.4.A.2c|13
Service brake: efficiency below requirements |3.7.B.7|12
Rear fog lamp tell tale not working |1.3.1b|12
Nearside Rear Shock absorber has a serious fluid leak |2.7.3|12
Offside Front front brake binding |3.7.B.1|12
Rear brake application uneven12
Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|12
Nearside Side repeater not working |1.4.A.2c|11
Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f|11
Nearside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|11
Battery insecure |1.9.1|11
Front brake disc in such a condition that it is seriously weakened11
Front brake application uneven10
Horn not working |1.6.2a|10
Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|10
Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f|10
Power steering component|s| leaking |2.3.3b|10
Nearside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|10
Offside Rear Shock absorber has a serious fluid leak |2.7.3|9
Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a|9
Offside Rear position lamp|s| not working |1.1.A.3b|9
Offside Headlamp not working on main beam |1.7.5a|9
Nearside Headlamp not working on dipped beam |1.7.5a|9
Exhaust system not adequately supported |7.1.1|9
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|9
Windscreen washer not working 9
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))9
Fuel system component leaking |7.2.3|8
Hazard warning lamps inoperative |1.4.B.1b|8
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|8
Offside Rear brake disc excessively pitted |3.5.1h|8
Offside Rear Stop lamp not working |1.2.1b|8
Offside Headlamp not working on dipped beam |1.7.5a|8
Offside Side repeater not working |1.4.A.2c|8
Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|8
Nearside Front front brake binding |3.7.B.1|8
Offside Rear Rear fog lamp not working |1.3.2b|8
Nearside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))8
Offside Front Lower Suspension arm corroded and seriously weakened |2.4.G.1|7
Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|7
Anti-lock braking system warning lamp does not illuminate |3.4.1b|7
Nearside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Offside Front Suspension arm corroded and seriously weakened |2.4.G.1|7
Front Steering damper leaking oil |2.2.C.1f|7
Nearside Inner Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|7
Windscreen has damage7
Nearside Rear Stop lamp not working |1.2.1b|7
Centre Exhaust system not adequately supported |7.1.1|7
Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|7
Rear Exhaust has a major leak of exhaust gases |7.1.2|7
Offside Front Steering component mounting prescribed area is excessively corroded |2.2.C.1h|7
Nearside Front Upper Suspension component mounting prescribed area is excessively corroded |2.4.A.3|7
Mechanical brake component has restricted free movement6
Nearside Front Exhaust has a major leak of exhaust gases |7.1.2|6
Offside Headlamp aim beam image obviously incorrect |1.8.A.1b|6
Exhaust has part of the system excessively deteriorated |7.1.1a|6
Nearside Front Direction indicator not working |1.4.A.2c|6
Rear Rear fog lamp not working |1.3.2b|6
Hazard warning tell tale not working correctly |1.4.B.1e|6
Offside Windscreen wiper blade deteriorated |8.2.2|6
Emissions not tested |7.0|6
Nearside Rear Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|6
Exhaust emits excessive dense blue smoke during acceleration |7.3.A.2c|6
Nearside Rear position lamp|s| not working |1.1.A.3b|6
Offside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|6
Nearside Headlamp not working on main beam |1.7.5a|6
Windscreen wiper blade insecure6
Offside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))6
Nearside Front Suspension arm corroded and seriously weakened |2.4.G.1|5
Offside Rear rear brake recording little or no effort |3.7.B.5a|5
Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2|5
Nearside rear brake recording little or no effort |3.7.B.5a|5
Offside Front Service brake excessively binding |1.2.1 |f||5
Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|5
Offside Front Brake hose bulging under pressure |3.6.B.3|5
Offside Front coil spring incomplete |2.4.C.1a|5
Front Windscreen wiper not operating automatically when switched on |8.2.1b|5
Offside rear brake recording little or no effort |3.7.B.5a|5
Offside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|5
Steering box has a significant oil leak |2.2.D.2e|5
Nearside Front Headlamp not working on dipped beam |1.7.5a|5
Nearside Front Front position lamp|s| not working |1.1.A.3b|5
Nearside Rear Direction indicator not working |1.4.A.2c|5
Offside Front coil spring fractured |2.4.C.1a|5
Offside Front Track rod end ball joint has excessive play |2.2.B.1f|5
Centre Exhaust mounting missing |7.1.1b|5
Offside Front Body has a sharp edge caused by corrosion |6.1.C.1|5
Offside Rear Seat belt retracting mechanism defective |5.2.5b|5
Nearside Rear Seat belt retracting mechanism defective |5.2.5b|5
Rear Mechanical brake component has restricted free movement5
Rear brake disc in such a condition that it is seriously weakened5
Offside Front Lower Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|5
Offside Front Service brake excessively binding (1.2.1 (f))5
Nearside Front Upper Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))5
Nearside Front Suspension arm ball joint dust cover no longer prevents the ingress of dirt |5.3.4 |b| |ii||4
Nearside Rear rear brake recording little or no effort |3.7.B.5a|4
Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2|4
Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a|4
Front Exhaust has part of the system excessively deteriorated |7.1.1a|4
Nearside Front Sub-frame rubber bush deteriorated resulting in excessive movement |2.4.G.2|4
Offside Front Sub-frame rubber bush deteriorated resulting in excessive movement |2.4.G.2|4
Offside Track rod end ball joint has excessive play |2.2.B.1f|4
Offside Front Front position lamp|s| not working |1.1.A.3b|4
Nearside Rear Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2|4
Nearside Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1|4
Offside Front Direction indicators not working |1.4.A.2c|4
Nearside Rear brake disc excessively pitted |3.5.1h|4
Offside Rear Suspension arm corroded and seriously weakened |2.4.G.1|4
Steering pivot point has excessive play |2.2.B.1g|4
Driver`s seat cannot be secured in the upright position. |6.2.A.2|4
Nearside Front coil spring fractured |2.4.C.1a|4
Nearside Steering pivot point has excessive play |2.2.B.1g|4
Nearside Front Brake hose bulging under pressure |3.6.B.3|4
Centre Steering damper leaking oil |2.2.C.1f|4
Fuel cap/sealing device does not fasten securely maintaining the sealing arrangement |7.2.4b|4
Nearside Windscreen wiper blade deteriorated |8.2.2|4
Offside Front brake caliper has restricted free movement |3.5.1k|4
Offside Front Windscreen wiper blade deteriorated |8.2.2|4
Nearside Front brake caliper has restricted free movement |3.5.1k|4
Nearside Front Body has a sharp edge caused by corrosion |6.1.C.1|4
Offside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt |5.3.4 |b| |ii||4
Rear Stop lamp not working |1.2.1b|4
Power steering pipe|s| or hose|s| leaking |2.3.3b|4
Nearside Front Service brake excessively binding (1.2.1 (f))4
Offside Rear Service brake excessively binding (1.2.1 (f))4
Service brake efficiency below requirements (1.2.2 (a) (i))4
Parking brake efficiency below requirements (1.4.2 (a) (i))4

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.

Got suggestions? We’re improving this section all the time. If you have any suggestions, please let us know.

Find us on Facebook

© KnowYourCar™ 2019. All rights reserved
Except where otherwise noted, content on our MOT statistics pages are licensed under a Creative Commons Attribution 4.0 International license.
You are free to redistribute the material in any medium or format as long as credit is given to KnowYourCar

WARNING: We have placed hidden watermarks in our data. We will take action against our data being used outside of these terms.

MOT Data licensed under the Open Government Licence v3.0

By using our site you are agreeing to our terms and conditions
Terms & Conditions  Privacy Policy