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MOT History from tests of petrol MERCEDES BENZ 420s year 1992

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:75.40%
(The average a petrol MERCEDES BENZ 420 year 1992 passes without issue)
Based on:309 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment11
Registration plate lamp issues7
Windscreen wiper does not clear the windscreen effectively6
Registration plate issues6
Brake pipe excessively corroded5
Nearside Rear Shock absorber has a serious fluid leak |2.7.3|4
Parking brake: efficiency below requirements |3.7.B.7|4
Brake hose excessively deteriorated4
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|4
Brakes imbalanced across an axle3
Front Exhaust has a major leak of exhaust gases |7.1.2|3
Horn not working |1.6.2a|2
Exhaust has a major leak of exhaust gases |7.1.2|2
Nearside Front position lamp|s| not working |1.1.A.3b|2
Exhaust emits dense blue smoke at idle |7.3.A.2b|2
Rear Exhaust has a major leak of exhaust gases |7.1.2|2
Rear brake disc excessively pitted |3.5.1h|2
Nearside Front Passenger`s seat cannot be secured in the upright position. |6.2.A.2|2
Offside Rear fog lamp not working |1.3.2b|2
Nearside Steering pivot point has excessive play |2.2.B.1g|2
Rear Exhaust system not adequately supported |7.1.1|2
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|2
Offside Stop lamp not working |1.2.1b|2
Anti-lock braking system warning lamp indicates an ABS fault2
Offside Headlamp excessively damaged so that the light output is severely reduced |1.7.5a|1
Hazard warning switch faulty |1.4.B.1d|1
Fuel cap/sealing device does not fasten securely by positive means |7.2.4b|1
Nearside Rear Shock absorber has negligible damping effect |2.7.5|1
Rear fog lamp switch faulty |1.3.1a|1
Rear fog lamp tell tale not working |1.3.1b|1
Battery insecure |1.9.1|1
Nearside Exhaust has a major leak of exhaust gases |7.1.2|1
Nearside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|1
Rear brake binding1
Rear parking brake recording little or no effort1
Driver`s seat cannot be secured in the upright position. |6.2.A.2|1
Front Passenger`s seat cannot be secured in the upright position. |6.2.A.2|1
Nearside Rear Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|1
Offside Rear Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|1
Offside Front Lower Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|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
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|1
Upper Stop lamp not working |1.2.1b|1
Offside Front Brake hose bulging under pressure |3.6.B.3|1
Nearside Front Direction indicator insecure |1.4.A.2b|1
Rear Parking brake lever has no reserve travel |3.1.6b|1
Nearside Rear brake disc cracked |3.5.1h|1
Nearside Rear Stop lamp excessively damaged so that it is not visible from a reasonable distance |1.2.1d|1
Offside Rear Stop lamp not working |1.2.1b|1
Exhaust emits excessive dense blue smoke during acceleration |7.3.A.2c|1
Rear fog lamp not working |1.3.2b|1
Front Body insecure and dangerous to other road users |6.1.B.1b|1
Rear Body insecure and dangerous to other road users |6.1.B.1b|1
Emissions not tested Exhaust system defect |8.2.1.2 |d||1
Exhaust has a major leak of exhaust gases Middle box & possibly elsewhere |6.1.2 |a||1
Nearside Rear Stop lamp not working |1.2.1b|1
Rear Lower Passenger`s seat insecure |6.2.A.1|1
Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Offside Front position lamp|s| not working |1.1.A.3b|1
Offside Headlamp not working on dipped beam |1.7.5a|1
Offside Headlamp not working on main beam |1.7.5a|1
Front Exhaust has part of the system excessively deteriorated |7.1.1a|1
Nearside Front Front wheel bearing rough when rotated |2.5.A.2|1
Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii||1
Nearside Windscreen wiper blade missing |3.4 |b| |ii||1
Nearside Rear Lower Suspension arm corroded and seriously weakened |2.4.G.1|1
Offside Rear Rear fog lamp not working |1.3.2b|1
Nearside Front Side repeater not working |1.4.A.2c|1
Service brake: efficiency below requirements |3.7.B.7|1
Nearside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2|1
Offside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2|1
Offside Bonnet cannot be secured in the closed position |8.4.1|1
Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|1
Exhaust has part of the system excessively deteriorated |7.1.1a|1
Centre Exhaust has a major leak of exhaust gases |7.1.2|1
Windscreen has damage1
Fuel pipe leaking |7.2.3|1
Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|1
Parking brake lever defective so that it cannot be satisfactorily operated |3.1.3c|1
Offside Rear Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|1
Fuel cap/sealing device sealing washer deteriorated |7.2.4c|1
Offside Headlamp not in good working order adversely affecting beam image |1.2.4a|1
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|1
Offside Front Front position lamp|s| not working |1.1.A.3b|1
Offside Front Headlamp not working on dipped beam |1.7.5a|1
Power steering pump leaking from a failed seal |2.3.3b|1
Offside Front Lower Suspension component mounting prescribed area is excessively corroded |2.4.A.3|1
Windscreen washer not working 1
Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|1
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|1
Nearside Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a|1
Rear Stop lamp|s| all not working |4.3.1 |a| |iii||1
Nearside Stop lamp not working |1.2.1b|1
Rear Fuel system component leaking |7.2.3|1
Nearside Front Suspension component mounting prescribed area is excessively corroded inner wing |2.4.A.3|1
Nearside Lower Front suspension ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|1
Fuel system component leaking |7.2.3|1
Rear Body has a sharp edge caused by corrosion |6.1.C.1|1
Nearside Front Body has a sharp edge caused by corrosion |6.1.C.1|1
Parking brake efficiency below requirements (1.4.2 (a) (i))1
Offside Front Windscreen washer jets misaligned and not providing sufficient fluid to the windscreen (3.5 (a))1
Exhaust emissions hydrocarbon content excessive (8.2.1.2 (b))1
Nearside Rear Service brake excessively binding (1.2.1 (f))1
Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))1
Nearside Front Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))1
Offside Front Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))1
Rear Exhaust system insecure rear mounts broken (6.1.2 (a))1
Nearside Stop lamp(s) not working (4.3.1 (a) (ii))1
Emissions not tested due to burst leaking exhaust (8.2.1.2 (d))1
Central Front Body component corroded and likely to cause injury bumper corroded/cracked and holed (6.2.1 (a) (i))1
Nearside Front Inner Track rod end ball joint has excessive play (2.1.3 (b) (i))1
Rear Service brake excessively fluctuating both rear (1.2.1 (e))1
Central Exhaust has a major leak of exhaust gases exhaust corroded/holed above and below silencer [y]sections (6.1.2 (a))1
Rear fog lamp not working (4.5.1 (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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