>

MOT History from tests of petrol MERCEDES BENZ 420s year 1989

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:76.70%
(The average a petrol MERCEDES BENZ 420 year 1989 passes without issue)
Based on:3,949 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment210
Windscreen wiper does not clear the windscreen effectively118
Registration plate lamp issues95
Brake pipe excessively corroded94
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|73
Parking brake: efficiency below requirements |3.7.B.7|63
Brake hose excessively deteriorated54
Brakes imbalanced across an axle45
Rear brake binding35
Rear parking brake recording little or no effort32
Exhaust has a major leak of exhaust gases |7.1.2|31
Anti-lock braking system warning lamp indicates an ABS fault31
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|28
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|24
Offside Rear fog lamp not working |1.3.2b|24
Registration plate issues23
Offside Stop lamp not working |1.2.1b|21
Rear fog lamp tell tale not working |1.3.1b|21
Nearside Stop lamp not working |1.2.1b|20
Offside front brake binding |3.7.B.1|19
Exhaust engine idle speed too high |7.3.A.2a|17
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|17
Front Exhaust has a major leak of exhaust gases |7.1.2|15
Offside Front position lamp|s| not working |1.1.A.3b|14
Rear Exhaust system not adequately supported |7.1.1|14
Nearside front brake binding |3.7.B.1|14
Centre Exhaust has a major leak of exhaust gases |7.1.2|14
Offside Front Track rod end ball joint has excessive play |2.2.B.1f|13
Rear fog lamp switch faulty |1.3.1a|13
Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|13
Offside Track rod end ball joint has excessive play |2.2.B.1f|11
Hazard warning switch faulty |1.4.B.1d|11
Nearside Front front brake binding |3.7.B.1|11
Rear fog lamp not working |1.3.2b|10
Offside Headlamp not working on main beam |1.7.5a|10
Parking brake lever has no reserve travel |3.1.6b|10
Front brake disc in such a condition that it is seriously weakened10
Rear Exhaust has a major leak of exhaust gases |7.1.2|9
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|9
Nearside Headlamp not working on dipped beam |1.7.5a|9
Anti-lock braking system warning lamp does not illuminate |3.4.1b|9
Offside Side repeater not working |1.4.A.2c|9
Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|9
Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|9
Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|9
Service brake: efficiency below requirements |3.7.B.7|9
Nearside Front Brake hose bulging under pressure |3.6.B.3|9
Exhaust emits excessive dense blue smoke during acceleration |7.3.A.2c|9
Offside Front Brake hose bulging under pressure |3.6.B.3|9
Exhaust emits dense blue smoke at idle |7.3.A.2b|9
Nearside Rear Shock absorber has a serious fluid leak |2.7.3|8
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|8
Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f|8
Offside Rear position lamp|s| not working |1.1.A.3b|8
Driver`s seat cannot be secured in the upright position. |6.2.A.2|8
Horn not working |1.6.2a|8
Hazard warning lamps inoperative |1.4.B.1b|8
Offside Front coil spring fractured |2.4.C.1a|8
Nearside Side repeater not working |1.4.A.2c|7
Offside Headlamp not working on dipped beam |1.7.5a|7
Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f|7
Nearside Rear position lamp|s| not working |1.1.A.3b|7
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|7
Emissions not tested |7.0|7
Offside Front front brake binding |3.7.B.1|7
Windscreen washer not working 7
Nearside Front Exhaust has a major leak of exhaust gases |7.1.2|7
Rear Mechanical brake component has restricted free movement7
Nearside Front position lamp|s| not working |1.1.A.3b|6
Nearside Headlamp not working on main beam |1.7.5a|6
Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|6
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|6
Rear Rear fog lamp not working |1.3.2b|6
Offside Front Front position lamp|s| not working |1.1.A.3b|6
Centre Exhaust system not adequately supported |7.1.1|6
Front brake application uneven6
Nearside Front Direction indicator not working |1.4.A.2c|6
Nearside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2|6
Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a|6
Exhaust system not adequately supported |7.1.1|6
Mechanical brake component has restricted free movement6
Battery insecure |1.9.1|6
Offside Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1|6
Windscreen has damage6
Offside Rear Body has a sharp edge caused by corrosion |6.1.C.1|5
Rear fog lamp switch insecure |1.3.1a|5
Nearside Front Track rod end ball joint has excessive play |2.2.B.1f|5
Front Steering damper leaking oil |2.2.C.1f|5
Nearside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|5
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|5
Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2|5
Nearside Rear rear brake recording little or no effort |3.7.B.5a|5
Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|5
Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|5
Fuel cap/sealing device does not fasten securely maintaining the sealing arrangement |7.2.4b|5
Nearside Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1|5
Nearside Front coil spring fractured |2.4.C.1a|5
Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a|5
Nearside Front Service brake excessively binding (1.2.1 (f))5
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|4
Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|4
Offside Driver`s seat cannot be secured in the upright position. |6.2.A.2|4
Nearside Rear Stop lamp not working |1.2.1b|4
Brake hydraulic reservoir fluid level below minimum level |3.6.G.1b|4
Nearside Front Direction indicator incomplete |1.5.A1b|4
Nearside Front Headlamp not working on dipped beam |1.7.5a|4
Offside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2|4
Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e|4
Front Exhaust has part of the system excessively deteriorated |7.1.1a|4
Nearside Front Ball joint has excessive play |2.2.B.1f|4
Rear brake application uneven4
Brake performance not tested |3.7.A.1|4
Driver`s seat fore and aft adjustment mechanism not functioning as intended. |6.2.A.3|4
Offside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|4
Nearside Front Side repeater not working |1.4.A.2c|4
Nearside Front Seat belt locking mechanism does not secure or release |5.2.5a|4
Offside Rear Rear fog lamp not working |1.3.2b|4
Bonnet cannot be secured in the closed position |8.4.1|4
Windscreen wiper blade insecure4
Centre Exhaust mounting missing |7.1.1b|4
Nearside Rear Seat belt retracting mechanism defective |5.2.5b|4
Nearside Track rod end ball joint has excessive play |2.2.B.1f|4
Hazard warning switch inoperative (4.4.2 (a) (ii))4
Offside Rear Position lamp not working (4.2.1 (a) (ii))4
Offside Rear Service brake excessively binding (1.2.1 (f))4
Nearside Front Brake hose leaking |3.6.A.1|3
Nearside Front Wheel bolt|s| missing |4.2.A.1e|3
Nearside Front Lower Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|3
Fuel system component leaking |7.2.3|3
Steering box has a significant oil leak |2.2.D.2e|3
Offside Front Headlamp not working on dipped beam |1.7.5a|3
Fuel system component insecure |7.2.1|3
Nearside Steering pivot point has excessive play |2.2.B.1g|3
Nearside Rear Direction indicator not working |1.4.A.2c|3
Fuel pipe leaking |7.2.3|3
Front Passenger`s seat cannot be secured in the upright position. |6.2.A.2|3
Brake hose damaged3
Offside Rear rear brake recording little or no effort |3.7.B.5a|3
Nearside Front Front wheel bearing rough when rotated |2.5.A.2|3
Power steering component|s| leaking |2.3.3b|3
Nearside Rear Rear wheel bearing has excessive play |2.6.2|3
Offside Inner Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|3
Nearside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|3
Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a|3
Offside Headlamp not in good working order adversely affecting beam image |1.2.4a|3
Offside Front Exhaust has a major leak of exhaust gases |7.1.2|3
Nearside Front Body has a sharp edge caused by corrosion |6.1.C.1|3
Rear Fuel system component leaking |7.2.3|3
Rear brake disc in such a condition that it is seriously weakened3
Offside Front Ball joint has excessive play |2.2.B.1f|3
Nearside Front coil spring broken |2.4.C.1a|3
Offside Outer Track rod end ball joint has excessive play |2.2.B.1f|3
Nearside Front passenger seat cannot be secured in the upright position. |6.2.4|3
Offside Rear coil spring fractured |2.4.C.1a|3
Suspension component mounting prescribed area is excessively corroded |2.4.A.3|3
Offside Front Front wheel bearing has excessive play |2.5.A.3c|3
Nearside Front Steering pivot point has excessive play |2.2.B.1g|3
Exhaust has part of the system excessively deteriorated |7.1.1a|3
Nearside Rear coil spring fractured |2.4.C.1a|3
Offside Front coil spring incomplete |2.4.C.1a|3
Nearside Front Passenger`s seat cannot be secured in the upright position. |6.2.A.2|3
Nearside Rear Service brake excessively binding (1.2.1 (f))3
Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i))3
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))3
Nearside Rear Position lamp not working (4.2.1 (a) (ii))3
Brake performance not tested (1.2.1 (g))3

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