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G414 THX

1989 Mercedes-benz 420

Blue Petrol 4196cc
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MOT Status

Expired
Expires9 Mar 2026
Tests22 (13 pass, 9 fail)
Pass rate59.1%

Mileage

101,580 mi
Last recorded101,580 miles
Recorded on10 Mar 2025
Typical for 1989 Mercedes-benz 420104,245 mi

Below or average mileage for this year

4 checks still locked for this Mercedes-benz
Stolen
Finance
Write-off
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Vehicle Details

RegistrationG414 THX
MakeMercedes-benz
Model420
Year1989
ColourBlue
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

13 pass 9 fail
Pass 10 Mar 2025 101,580 miles

Nearside Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

Pass 27 Feb 2024 101,217 miles
Fail 15 Feb 2024 101,194 miles

Front Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))

Nearside Front Suspension component mounting prescribed area fractured significantly reducing structural strength Area around suspension damper top mount. (5.3.6 (a) (i))

Nearside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength Inner wing corroded. 30mm hole in metal (5.3.6 (a) (i))

Rear fog lamp not working (4.5.1 (a) (ii))

Pass 10 Mar 2022 101,074 miles
Fail 5 Jul 2021 101,064 miles

Offside Front Suspension component corroded and seriously weakened Anti roll bar mounting (5.3.3 (b) (i))

Nearside Front Outer Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))

Rear Exhaust emits blue smoke during acceleration (8.2.1.2 (g))

nearside front inner wing rusting

nearside inner door sill rusting

nearside rear floorpan rusting

Pass 29 Jun 2020 101,014 miles

Nearside Front Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))

Offside Front Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))

Pass 19 Jul 2018 100,856 miles
Pass 1 Jun 2017 100,575 miles

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

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

Pass 17 Mar 2016 100,346 miles
Fail 11 Mar 2016 100,317 miles

Nearside Rear brake caliper has restricted free movement (3.5.1k)

Steering damper leaking oil (2.2.C.1f)

Pass 7 Jan 2015 100,113 miles
Pass 11 Jan 2014 99,874 miles
Fail 11 Jan 2014 99,871 miles

Nearside Front Windscreen washer provides insufficient washer liquid (8.2.3)

Steering damper leaking oil (2.2.C.1f)

Pass 4 Jul 2012 99,192 miles

nearside front inner wing corrosion apparant

Fail 26 Jun 2012 99,152 miles

Nearside Front Upper Front suspension has serious deterioration of the bonding between metal and flexible material of an upper support bearing (2.5.B.3a)

Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings (6.1.B.2)

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

nearside front inner wing corrosion apparant

Pass 13 Jun 2011 97,141 miles
Fail 10 Jun 2011 97,138 miles

Front Steering damper leaking oil (2.2.C.1f)

Front Windscreen washer provides insufficient washer liquid (8.2.3)

Pass 23 Apr 2010 96,307 miles

Offside Rear brake disc slightly pitted (3.5.1h)

offside front indicater lense cracked

offside rear tyre outer sidewall deteriorating/perished

Fail 19 Apr 2010 96,305 miles

Nearside Registration plate lamp insecure (1.1.C.1c)

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

Offside Rear position lamp(s) excessively damaged so that it is not visible from a reasonable distance (1.1.A.3d)

Offside Registration plate lamp not working (1.1.5c)

Offside Rear brake disc slightly pitted (3.5.1h)

nearside rear brake binding slightly

offside front indicater lense cracked

offside rear tyre outer sidewall deteriorating/perished

Fail 24 Sep 2008 94,753 miles

Rear Registration plate lamp not working (1.1.5c)

Pass 24 Sep 2008 94,753 miles
Fail 2 Sep 2008

Anti-lock braking system warning lamp indicates an ABS fault (3.4.1c)

Brakes imbalanced across an axle (3.7.B.5b)

Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings (6.1.B.2)

Nearside Headlamp aim too low (1.8)

Nearside Windscreen washer provides insufficient washer liquid (8.2.3)

Offside Headlamp aim too low (1.8)

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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G414 THX is a 1989 Mercedes-benz 420 in Blue with a 4,196cc petrol engine. This vehicle has been through 22 MOT tests with a personal pass rate of 59.1%.

Across all 1989 Mercedes-benz 420 models, the average MOT pass rate is 78.1% with a typical mileage of 104,245 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 G414 THX, 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 37 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 G414 THX?

You can check the full history of G414 THX by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was G414 THX registered?

G414 THX is a 1989 Mercedes-benz 420, first registered on 1 August 1989.

Is G414 THX safe to buy?

The MOT history for G414 THX shows 22 tests with a 59.1% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does G414 THX 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 G414 THX. If you buy a car with outstanding finance, the finance company can repossess it.

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