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MOT History from tests of petrol MERCEDES BENZ 420s year 1979

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:74.77%
(The average a petrol MERCEDES BENZ 420 year 1979 passes without issue)
Based on:214 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment16
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|8
Windscreen wiper does not clear the windscreen effectively7
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|6
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|6
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|6
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|6
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|4
Exhaust has a major leak of exhaust gases |7.1.2|4
Brake pipe excessively corroded3
Registration plate lamp issues3
Offside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|3
Rear Exhaust has a major leak of exhaust gases |7.1.2|3
Nearside front brake binding |3.7.B.1|3
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|3
Nearside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|3
Offside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Offside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Offside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Offside Lower Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Nearside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|2
Registration plate issues2
Brakes imbalanced across an axle2
Offside front brake binding |3.7.B.1|2
Offside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Nearside Rear position lamp|s| not working |1.1.A.3b|1
Offside Rear Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1|1
Nearside Front front brake binding |3.7.B.1|1
Offside Front Seat belt retracting mechanism defective |5.2.5b|1
Offside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|1
Offside Outer Seat belt anchorage prescribed area is excessively corroded Sill area |5.2.6|1
Offside Rear Suspension component mounting prescribed area is excessively corroded Antiroll bar mounting area |2.4.A.3|1
Offside Front Exhaust has a major leak of exhaust gases |7.1.2|1
Centre Exhaust has a major leak of exhaust gases |7.1.2|1
Front passenger door cannot be opened from inside the vehicle |6.2.B.1b|1
Offside Front Brake hose bulging under pressure |3.6.B.3|1
Nearside Front Position lamp not working |4.2.1 |a||1
Offside Rear Position lamp not working |4.2.1 |a||1
Nearside Steering arm excessively corroded and unserviceable |2.2.C.1d|1
Offside Stop lamp not working |1.2.1b|1
Offside Front Body or chassis has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Rear Exhaust system not adequately supported |7.1.1|1
Offside Front Steering component mounting prescribed area is excessively corroded |2.2.C.1h|1
Offside Front front brake binding |3.7.B.1|1
Nearside Rear front brake binding |3.7.B.1|1
Offside Rear front brake binding |3.7.B.1|1
Emissions not tested |7.0|1
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings floor |6.1.B.2|1
Parking brake: efficiency below requirements |3.7.B.7|1
Rear parking brake recording little or no effort1
Nearside Front Front position lamp|s| incorrect colour |1.1.A.3e|1
Offside Front position lamp|s| incorrect colour |1.1.A.3e|1
Nearside Rear Brake hose excessively damaged |3.6.B.4d|1
Nearside Front Seat belt damaged sufficient to obstruct correct operation of the belt |5.2.2a|1
Offside Front Seat belt damaged sufficient to obstruct correct operation of the belt |5.2.2a|1
Nearside Track rod end ball joint has excessive play |2.2.B.1f|1
Windscreen wiper not operating automatically when switched on |8.2.1b|1
Rear brake binding1
Nearside Front wheel bearing has excessive play |2.5.A.3c|1
Offside Front wheel bearing has excessive play |2.5.A.3c|1
Offside Track rod end ball joint has excessive play |2.2.B.1f|1
Nearside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Body or chassis has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Centre Front Exhaust has a major leak of exhaust gases |7.1.2|1
Nearside Front Sub-frame rubber bush deteriorated resulting in excessive movement |2.4.G.2|1
Offside Front Sub-frame rubber bush deteriorated resulting in excessive movement |2.4.G.2|1
Offside Rear Stop lamp not working |1.2.1b|1
Nearside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Direction indicators not working |1.4.A.2c|1
Hazard warning lamps inoperative |1.4.B.1b|1
Stop lamp not working |1.2.1b|1
Nearside Rear Brake hose bulging under pressure |3.6.B.3|1
Offside Rear Brake hose bulging under pressure |3.6.B.3|1
Nearside Rear Brake hose leaking |3.6.A.1|1
Offside Rear Brake hose leaking |3.6.A.1|1
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|1
Battery insecure |1.9.1|1
Nearside Front Steering pivot point has excessive play |2.2.B.1g|1
Offside Front Statutory seat belt missing |5.1.1|1
Nearside Front Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Nearside Rear Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Offside Front Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Offside Rear Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Service brake: efficiency below requirements |3.7.B.7|1
Nearside Front Brake hose bulging under pressure |3.6.B.3|1
Nearside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a|1
Nearside Rear Direction indicator adversely affected by the operation of another lamp |1.4.A.2h|1
Nearside Headlamp not working on dipped beam |1.7.5a|1
Offside Headlamp not working on dipped beam |1.7.5a|1
Front Exhaust has a major leak of exhaust gases |7.1.2|1
Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a|1
Offside Driver`s seat cannot be secured in the upright position. |6.2.A.2|1
Nearside Driver`s seat cannot be secured in the upright position. |6.2.A.2|1
Horn not working |1.6.2a|1
Offside Front Seat belt insecurely fixed to the seat stalk |5.2.1a|1
Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|1
Exhaust has part of the system excessively deteriorated |7.1.1a|1
Centre Front Exhaust has part of the system excessively deteriorated |7.1.1a|1
Nearside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6|1
Nearside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|1
Offside Front Upper Brake master cylinder/servo mounting prescribed area is excessively corroded |3.6.C.3|1
Nearside Front Anti-roll bar linkage severely distorted |2.4.G.1|1
Windscreen has damage1
Power steering component|s| leaking |2.3.3b|1
Offside Rear Shock absorber has a serious fluid leak |2.7.3|1
Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii))1
Offside Front Hydraulic brake calliper leaking (1.1.16 (b) (i))1
Fuel system component leaking (6.1.3 (b) (i))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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