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MOT History from tests of petrol MERCEDES BENZ 420s year 1980

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:67.80%
(The average a petrol MERCEDES BENZ 420 year 1980 passes without issue)
Based on:236 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment17
Rear brake binding13
Windscreen wiper does not clear the windscreen effectively12
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|6
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|5
Registration plate lamp issues5
Nearside Stop lamp not working |1.2.1b|4
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|4
Offside Front Seat belt retracting mechanism defective |5.2.5b|4
Exhaust has a major leak of exhaust gases |7.1.2|4
Parking brake: efficiency below requirements |3.7.B.7|4
Registration plate issues4
Offside Front 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|3
Rear fog lamp not working |1.3.2b|3
Offside Headlamp not working on main beam |1.7.5a|3
Offside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|3
Rear Exhaust system not adequately supported |7.1.1|3
Nearside Front front brake binding |3.7.B.1|2
Nearside Front Body or chassis has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Offside Front Body or chassis has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Nearside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Offside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|2
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|2
Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6|2
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|2
Offside front brake binding |3.7.B.1|2
Rear Exhaust has a major leak of exhaust gases |7.1.2|2
Nearside Headlamp not working on main beam |1.7.5a|2
Offside Rear Stop lamp not working |1.2.1b|2
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|2
Centre Exhaust system not adequately supported |7.1.1|2
Direction indicators not working |1.4.A.2c|2
Hazard warning lamps inoperative |1.4.B.1b|2
Offside Stop lamp not working |1.2.1b|2
Horn not working |1.6.2a|2
Nearside Headlamp not working on dipped beam |1.7.5a|2
Offside Front Track rod end ball joint has excessive play |2.2.B.1f|2
Offside Front Shock absorber has a serious fluid leak |2.7.3|2
Front Windscreen wiper not operating automatically when switched on |8.2.1b|2
Brake hose excessively deteriorated2
Nearside Rear Stop lamp not working |1.2.1b|2
Driver`s seat cannot be secured in the upright position. |6.2.A.2|2
Rear Exhaust mounting missing |7.1.1b|2
Front brake disc in such a condition that it is seriously weakened2
Front passenger door cannot be opened from outside the vehicle |6.2.B.1b|2
Offside Front front brake binding |3.7.B.1|1
Nearside Windscreen wiper blade missing |8.2.2|1
Exhaust emits excessive dense blue smoke during acceleration |7.3.A.2c|1
Nearside Rear Body or chassis has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Rear Body or chassis has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Nearside Rear Vehicle structure has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Rear Vehicle structure has an inadequate repair which adversely affects braking or steering |6.1.A.1|1
Nearside Seat belt has a cut which has significantly weakened the webbing |5.2.2a|1
Offside Seat belt has a cut which has significantly weakened the webbing |5.2.2a|1
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Offside Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Nearside Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Offside Front Inner Track rod end ball joint has excessive play |2.1.3 |b| |i||1
Front passenger door cannot be opened from inside the vehicle |6.2.B.1b|1
Offside Front Body has a projection caused by corrosion |6.1.C.1|1
Centre Exhaust has a major leak of exhaust gases |7.1.2|1
Nearside Front Front position lamp|s| not working |1.1.A.3b|1
Hazard warning switch faulty |1.4.B.1d|1
Battery insecure |1.9.1|1
Headlamp not working on main beam Both |1.7.5a|1
Rear fog lamp tell tale not working |1.3.1b|1
Nearside Front Seat belt retracting mechanism defective |5.2.5b|1
Exhaust mounting missing |7.1.1b|1
Nearside Front Anti-roll bar corroded and seriously weakened |2.4.G.1|1
Offside Front Anti-roll bar worn and seriously weakened |2.4.G.1|1
Offside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6|1
Exhaust system not adequately supported |7.1.1|1
Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f|1
Offside Stop lamp adversely affected by the operation of another lamp |1.2.1f|1
Offside Direction indicator adversely affected by the operation of another lamp |1.4.A.2h|1
Rear Stop lamp adversely affected by the operation of another lamp |1.2.1f|1
Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f|1
Nearside Front Shock absorber has a serious fluid leak |2.7.3|1
Brake performance not tested |3.7.A.1|1
Emissions not tested |7.0|1
Service brake: efficiency below requirements |3.7.C.1a|1
Parking brake: efficiency below requirements |3.7.C.1b|1
Offside Lower Front suspension has excessive movement at a wishbone pin or bush |2.5.A.1c|1
Nearside Front Upper Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
All position lamps not working |1.1.A.3b|1
Hazard warning tell tale not working correctly |1.4.B.1e|1
Nearside Front Seat belt anchorage prescribed area is excessively corroded inner arch / floor / sill |5.2.6|1
Offside Front Seat belt anchorage prescribed area is excessively corroded floor |5.2.6|1
Nearside Rear Suspension component mounting prescribed area is excessively corroded floor / sill |2.4.A.3|1
Offside Rear Suspension component mounting prescribed area is excessively corroded floor / sill |2.4.A.3|1
Nearside Front Suspension component mounting prescribed area is excessively corroded front of inner arch |2.4.A.3|1
Offside Front Suspension component mounting prescribed area is excessively corroded inner arch |2.4.A.3|1
Rear Fuel system component leaking |7.2.3|1
Rear Mechanical brake component has restricted free movement1
Nearside Front position lamp|s| not working |1.1.A.3b|1
Nearside Rear Brake pipe inadequately clipped |3.6.B.1|1
Offside Rear Brake pipe inadequately clipped |3.6.B.1|1
Offside Front Brake pipe inadequately clipped |3.6.B.1|1
Nearside Front Seat belt insecurely fixed to the vehicles structure |5.2.1a|1
Offside Front Seat belt insecurely fixed to the vehicles structure |5.2.1a|1
Nearside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Inner Front Track rod end ball joint has excessive play |2.2.B.1f|1
Fuel system component insecure |7.2.1|1
Offside Rear Exhaust mounting missing |7.1.1b|1
Nearside Rear Brake hose twisted |3.6.B.4c|1
Offside Rear Brake hose twisted |3.6.B.4c|1
Exhaust engine idle speed too high |7.3.A.2a|1
Rear fog lamp switch faulty |1.3.1a|1
Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Nearside Front Intermediate drop arm insecure |2.2.B.1a|1
Nearside Front Battery insecure |1.9.1|1
Nearside Front Headlamp cleaning device inoperative |1.7.2|1
Offside Front Headlamp cleaning device inoperative |1.7.2|1
Nearside Front Seat belt damaged sufficient to significantly weakened the webbing |5.2.2a|1
Offside Front Driver`s seat fore and aft adjustment mechanism not functioning as intended. |6.2.A.3|1
Offside Front Headlamp not working on main beam |1.7.5a|1
Nearside Front Ball joint has excessive play |2.2.B.1f|1
Nearside Rear Body or chassis has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Rear Body or chassis has an unsatisfactory modification, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Parking brake lever has no reserve travel |3.1.6b|1
Rear brake disc excessively scored |3.5.1h|1
Front Shock absorber has negligible damping effect |2.7.5|1
Rear Shock absorber has negligible damping effect |2.7.5|1
Front Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Rear Sub-frame has excessive play in a pin/bush |2.4.G.2|1
Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Front coil spring corroded so that its cross sectional area is reduced and seriously weakened |2.4.C.1b|1
Rear coil spring corroded so that its cross sectional area is reduced and seriously weakened |2.4.C.1b|1
Front Front suspension has excessive movement at wishbone bearing |2.5.A.1c|1
Front Front suspension has excessive play in a lower wishbone bearing |2.5.B.1a|1
Steering box has relative movement between sector shaft and the drop arm |2.2.B.1b|1
Front Steering arm has relative movement at its fixings |2.2.B.1h|1
Hazard warning switch faulty Not flashing |1.4.B.1d|1
Dipswitch operation does not deflect all main beam headlamps to make them dipped beams |1.7.4b|1
Nearside Front Direction indicator not working |1.4.A.2c|1
Front front brake binding |3.7.B.1|1
Anti-lock braking system warning lamp indicates an ABS fault1
Rear Stop lamp not working |1.2.1b|1
Nearside Front Headlamp aim aimed so that it dazzles other road users |1.8.A.1a|1
Nearside Front Direction indicators not working |1.4.A.2c|1
Brake pipe excessively corroded1
Fuel pipe leaking |7.2.3|1
Nearside Rear Rear wheel bearing has excessive play |2.6.2|1
Power steering component|s| leaking |2.3.3b|1
Nearside Headlamp aim beam image kick up to the offside |1.6.B1|1
Offside Headlamp aim beam image kick up to the offside |1.6.B1|1
Front passenger seat cannot be secured in the upright position. |6.2.4|1
Nearside Front Upper Shock absorber insecure |2.7.2b|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
Nearside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2|1
Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Nearside Front brake disc excessively pitted |3.5.1h|1
Offside Front wheel bearing rough when rotated |2.5.A.2|1
Offside Headlamp not working on dipped beam |1.7.5a|1
Offside Front Position lamp not working |4.2.1 |a||1
Nearside Front Passenger`s seat cannot be secured in the upright position. |6.2.A.2|1
Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Front brake caliper has restricted free movement |3.5.1k|1
Nearside Rear Fuel hose leaking |7.2.3|1
Offside Rear brake caliper has restricted free movement |3.5.1k|1
Offside Front Brake hose bulging under pressure |3.6.B.3|1
Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Offside Rear An item not tested |Manual|1
Nearside Windscreen wiper blade deteriorated |8.2.2|1
Offside Windscreen wiper blade deteriorated |8.2.2|1
Nearside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Nearside Inner Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|1
Offside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i))1
Speedometer cannot be illuminated (7.8 (c) (ii))1
Nearside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i))1
Fuel cap/sealing device component leaking (6.1.3 (b) (i))1
Front Shock absorbers has a serious fluid leak damper (5.3.2 (b))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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