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D6 SLX

1986 Mercedes-benz 420

Red Petrol 4196cc
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MOT Status

Valid
Expires29 May 2027
Tests28 (17 pass, 11 fail)
Pass rate60.7%

Mileage

151,996 mi
Last recorded151,996 miles
Recorded on30 May 2026
Typical for 1986 Mercedes-benz 420107,080 mi

Significantly above average — investigate

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Vehicle Details

RegistrationD6 SLX
MakeMercedes-benz
Model420
Year1986
ColourRed
Fuel typePetrol
Engine4,196cc

All premium checks include

50+ data points
Finance Check (Experian) Insurance Write-off Salvage Auction Stolen Check Previous Owners Ex-Taxi, Police, NHS Mileage Anomaly Import / Export Scrapped Check Plate Changes

MOT History

17 pass 11 fail
Pass 30 May 2026 151,996 miles

Offside Front Brake disc worn, but not excessively Brake disc corroded over outer surface (1.1.14 (a) (i))

Pass 28 Apr 2025 151,994 miles

Nearside Front Direction indicator slightly affected by the operation of another lamp (4.4.3 (b))

Pass 3 May 2024 151,975 miles

Nearside Front Upper Suspension arm ball joint dust cover severely deteriorated Outer (5.3.4 (b) (i))

Fail 26 Apr 2024 151,974 miles

Front Windscreen washer provides insufficient washer liquid (3.5 (a))

Nearside Front Headlamp not working on main beam (4.1.1 (a) (ii))

Offside Front Headlamp aim too low (4.1.2 (a))

Nearside Front Upper Suspension arm ball joint dust cover severely deteriorated Outer (5.3.4 (b) (i))

Pass 4 Oct 2022 151,962 miles
Pass 17 Aug 2021 151,744 miles
Pass 5 Jun 2019 150,955 miles

Nearside Door, corroded

Offside Door, corroded

Offside Front Inner Steering linkage ball joint has slight play (2.1.3 (b) (i))

Rear Service brake fluctuating, but not excessively (1.2.1 (e))

Pass 5 Apr 2018 149,636 miles
Fail 5 Apr 2018 149,636 miles

Offside Front Direction indicator not working (1.4.A.2c)

Pass 23 Nov 2016 147,758 miles
Fail 21 Sep 2016 147,718 miles

Fuel system component leaking pump area (7.2.3)

Nearside Outer Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt (2.2.C.1c)

Nearside Rear Subframe mounting prescribed area is excessively corroded (2.4.A.3)

Offside Front Brake pipe excessively corroded (3.6.B.2c)

Offside Front Lower Suspension arm corroded and seriously weakened (2.4.G.1)

Steering arm has relative movement at its fixings idler arm bush worn to excess (2.2.B.1h)

Windscreen washer provides insufficient washer liquid (8.2.3)

Brake hose has slight corrosion to ferrules all (3.6.B.4e)

Front Bumper insecure valance

Nearside Front Lower Suspension arm corroded but not seriously weakened (2.4.G.1)

Nearside Rear Brake pad(s) wearing thin borderline (3.5.1g)

coil spring corroded both front and rear (2.4.C.1b)

corrosion throughout

engine knocking

van tyre fitted to nearside rear

Pass 23 Sep 2015 145,954 miles

Front Body has slight corrosion valance has slight corrosion (6.1.B.2)

Nearside Front Lower Front suspension ball joint dust cover damaged, but preventing the ingress of dirt (2.4.G.2)

Nearside Rear Body has slight corrosion wheel arch (6.1.B.2)

Offside Body has slight corrosion door has corrosion underside (6.1.B.2)

Offside Front Lower Front suspension ball joint dust cover damaged, but preventing the ingress of dirt (2.4.G.2)

Offside Rear Body has slight corrosion floor pan (6.1.B.2)

Fail 23 Sep 2015 145,954 miles

Front Body has slight corrosion valance has slight corrosion (6.1.B.2)

Nearside Front Headlamp has a product on the light source so that the light output is severely reduced (1.7.5a)

Nearside Front Lower Front suspension ball joint dust cover damaged, but preventing the ingress of dirt (2.4.G.2)

Nearside Front Windscreen washer provides insufficient washer liquid (8.2.3)

Nearside Rear Body has slight corrosion wheel arch (6.1.B.2)

Offside Body has slight corrosion door has corrosion underside (6.1.B.2)

Offside Front Lower Front suspension ball joint dust cover damaged, but preventing the ingress of dirt (2.4.G.2)

Offside Front Windscreen washer provides insufficient washer liquid (8.2.3)

Offside Rear Body has slight corrosion floor pan (6.1.B.2)

Fail 21 Sep 2015 149,918 miles

Nearside Front Headlamp aim too high (1.8)

Drivers door corroded

Front subframe bushes worn and have movement

Fuel cap seal slightly corroded

Nearside Front Track rod end ball joint dust cover deteriorated, but preventing the ingress of dirt (2.2.C.1c)

Nearside Rear Brake pad(s) wearing thin (3.5.1g)

Offside Front Brake pipe slightly corroded (3.6.B.2c)

Offside Front Lower Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)

Offside Front fog lamp not working

oil leak

rear brakes have imbalance

steering wheel has free play

Fail 9 Sep 2015 145,849 miles

Fuel system component leaking fuel pump (7.2.3)

Nearside Front Headlamp aim too high (1.8)

Nearside Rear Registration plate lamp not working (1.1.C.1d)

Nearside Rear position lamp(s) not working (1.1.A.3b)

Offside Front Headlamp aim too low (1.8)

Offside Front Windscreen wiper does not clear the windscreen effectively (8.2.2)

Offside Front position lamp(s) not working (1.1.A.3b)

Offside Rear Registration plate lamp not working (1.1.C.1d)

Offside Rear position lamp(s) not working (1.1.A.3b)

Drivers door corroded

Front subframe bushes worn and have movement

Fuel cap seal slightly corroded

Nearside Front Track rod end ball joint dust cover deteriorated, but preventing the ingress of dirt (2.2.C.1c)

Nearside Rear Brake pad(s) wearing thin (3.5.1g)

Offside Front Brake pipe slightly corroded (3.6.B.2c)

Offside Front Lower Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)

Offside Front fog lamp not working

oil leak

rear brakes have imbalance

steering wheel has free play

Pass 25 Sep 2014 143,370 miles

Steering system has slight free play detected at steering wheel (2.2.A.1a)

oil leak

Fail 10 Sep 2014 143,335 miles

Hazard warning lamps inoperative (1.4.B.1b)

Nearside Windscreen wiper does not clear the windscreen effectively (8.2.2)

Offside Front Seat belt anchorage prescribed area is excessively corroded (5.2.6)

Offside Front Subframe mounting prescribed area is excessively corroded (2.4.A.3)

Offside Front position lamp(s) not working (1.1.A.3b)

Brake hose has slight corrosion to ferrules (3.6.B.4e)

Front Anti-roll bar linkage rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

Front Sub-frame has slight play in a pin/bush (2.4.G.2)

Front bumper insecure

Front registration plate deteriorated but not likely to be misread (6.3.1d)

Offside Front Suspension component mounting prescribed area is corroded but not considered excessive (2.4.A.3)

Offside Obligatory mirror deteriorated, but not seriously affecting the rear view (8.1.2a)

Oil leak

Rear Brake pad(s) wearing thin (3.5.1g)

Rear Shock absorber has a slightly worn bush (2.7.4)

Rear Sub-frame rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

Steering system has slight free play detected at steering wheel (2.2.A.1a)

coil spring corroded (2.4.C.1b)

front valance rotten

offside wiper poor

steering idler arm bearing worn

Pass 9 Sep 2013 141,508 miles

Nearside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Offside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Pass 3 Aug 2012 139,037 miles

Nearside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Offside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Fail 25 Jul 2012 139,037 miles

Nearside Rear Shock absorber has negligible damping effect (2.7.5)

Nearside Rear Tyre has ply or cords exposed (4.1.D.1b)

Offside Front Direction indicator excessively damaged so that it is not visible from a reasonable distance (1.4.A.2e)

Windscreen washer provides insufficient washer liquid (8.2.3)

Nearside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Offside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Pass 5 Aug 2011 136,028 miles

Offside Front Body has slight corrosion (6.1.B.2)

Pass 6 Aug 2010 131,972 miles
Fail 4 Aug 2010 131,972 miles

Offside Front Suspension component mounting prescribed area is excessively corroded (2.4.A.3)

Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)

Pass 30 Dec 2008 130,232 miles

Offside Front Vehicle structure has slight corrosion (6.1.A.1)

Steering system has slight free play detected at steering wheel (2.2.A.1a)

Fail 29 Dec 2008 130,231 miles

Rear Fuel pipe union leaking (7.2.3)

Windscreen washer provides insufficient washer liquid (8.2.3)

Offside Front Vehicle structure has slight corrosion (6.1.A.1)

Steering system has slight free play detected at steering wheel (2.2.A.1a)

Pass 10 Oct 2007 128,204 miles
Fail 9 Oct 2007 128,204 miles

Headlamp aim too low (1.8)

Pass 13 Apr 2006 122,947 miles

How Reliable is the Mercedes-benz 420?

Based on 24,311 MOT tests across 2,343 vehicles.

75.7%
Pass Rate
809
Miles/Year
40
Year Lifespan
2,343
On UK Roads

Top MOT Failure Points

Suspension component mounting prescribed area is excessively corroded 647
Brake pipe excessively corroded 577
Tyre tread depth below requirements of 1.6mm 565
brake binding 530
Windscreen wiper does not clear the windscreen effectively 479
Full Mercedes-benz 420 reliability report

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D6 SLX is a 1986 Mercedes-benz 420 in Red with a 4,196cc petrol engine. This vehicle has been through 28 MOT tests with a personal pass rate of 60.7%.

Across all 1986 Mercedes-benz 420 models, the average MOT pass rate is 75.0% with a typical mileage of 107,080 miles. This particular vehicle has a lower pass rate than the average for its year, which may indicate maintenance issues worth investigating.

The most common reason a Mercedes-benz 420 fails its MOT is suspension component mounting prescribed area is excessively corroded, accounting for 647 recorded failures. If you're considering buying D6 SLX, it's worth having these areas checked by a mechanic before committing.

The Mercedes-benz 420 typically stays on UK roads for around 40 years. At 40 years old, this Mercedes-benz 420 is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of D6 SLX?

You can check the full history of D6 SLX by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was D6 SLX registered?

D6 SLX is a 1986 Mercedes-benz 420, first registered on 31 December 1986.

Is D6 SLX safe to buy?

The MOT history for D6 SLX shows 28 tests with a 60.7% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does D6 SLX have outstanding finance?

Finance checks require a premium vehicle report. This checks against all major UK finance providers to see if there is any outstanding finance on D6 SLX. If you buy a car with outstanding finance, the finance company can repossess it.

No warranty or guarantee of accuracy is provided for any free data on this page. The data guarantee applies only to information obtained through the purchase of a full check.