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F166 MNU

1988 Mercedes-benz 420

Black Petrol 4196cc
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MOT Status

Valid
Expires25 Jan 2027
Tests26 (17 pass, 9 fail)
Pass rate65.4%

Mileage

95,847 mi
Last recorded95,847 miles
Recorded on26 Jan 2026
Typical for 1988 Mercedes-benz 420101,568 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

RegistrationF166 MNU
MakeMercedes-benz
Model420
Year1988
ColourBlack
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 9 fail
Pass 26 Jan 2026 95,847 miles

Front Tyre slightly damaged/cracking or perishing Both NS and OS (5.2.3 (d) (ii))

Rear Tyre slightly damaged/cracking or perishing Both NS and OS (5.2.3 (d) (ii))

Fail 28 Oct 2025 95,819 miles

Offside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i))

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

Pass 15 Nov 2024 95,095 miles
Fail 1 Nov 2024 95,089 miles

Nearside Windscreen washer provides insufficient washer liquid pipe off jet (3.5 (a))

Offside Front Power steering component leaking Steering box (2.1.5 (a))

Offside Headlamp aim too high (4.1.2 (a))

Rear Oil leaking excessively from engine bell housing area (8.4.1 (a) (i))

Central Rear Fluid leak, but not excessive diff unit (8.4.1 (a) (i))

Pass 10 May 2023 92,892 miles
Pass 28 Apr 2022 92,262 miles

Nearside Front Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Pass 13 May 2020 90,636 miles

Nearside Front Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Fail 6 May 2020 90,626 miles

Nearside Front Service brake excessively binding (1.2.1 (f))

Nearside Front Lower Steering linkage insecure to the extent there is excessive movement at the mountings MARKED IN YELLOW CHALK (PIVOT POINT) (2.1.3 (a) (ii)) DANGEROUS

Pass 18 Apr 2018 89,706 miles
Pass 25 Mar 2017 89,046 miles

Nearside Front Steering pivot point has slight play (2.2.B.1g)

Nearside Rear Brake pipe slightly corroded (3.6.B.2c)

Nearside Rear Shock absorber has a light misting of oil (2.7.3)

Offside Rear Shock absorber has a light misting of oil (2.7.3)

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

oil leak

Pass 7 Apr 2016 88,436 miles

signs of oil leaks

signs of oil leaks ( diff area )

Pass 2 Apr 2015 87,723 miles

slight play in steering box

Pass 24 Mar 2014 86,895 miles

Centre Front Power steering component(s) has slight seepage from a component (2.3.3b)

Nearside Front Steering pivot point has slight play (2.2.B.1g)

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

Pass 28 Mar 2013 85,803 miles

Nearside Steering pivot point has slight play (2.2.B.1g)

Fail 28 Mar 2013 85,803 miles

Offside Headlamp not working on main beam (1.7.5a)

Nearside Steering pivot point has slight play (2.2.B.1g)

Pass 26 Jan 2012 84,787 miles

Nearside Steering pivot point has slight play (2.2.B.1g)

Fail 26 Jan 2012 84,787 miles

Direction indicators not working (1.4.A.2c)

Nearside Steering pivot point has slight play (2.2.B.1g)

Nearside Stop lamp not working (1.2.1b)

Offside Stop lamp not working (1.2.1b)

Pass 17 Jan 2011 84,058 miles
Pass 17 Apr 2009 82,251 miles

BOTH FRONT TYRES WEARING ON OUTER EDGE

Fail 14 Apr 2009 82,248 miles

Nearside Registration plate lamp not working (1.1.5c)

Nearside Stop lamp not working (1.2.1b)

Power steering pipe(s) or hose(s) leaking from a joint (2.3.3b)

BOTH FRONT TYRES WEARING ON OUTER EDGE

Pass 24 Apr 2008 80,722 miles
Fail 23 Apr 2008 80,717 miles

Nearside rear brake recording little or no effort (3.7.B.5a)

Parking brake: efficiency below requirements (3.7.B.7) DANGEROUS

Pass 23 Apr 2007 76,831 miles
Pass 6 Apr 2006 72,371 miles
Fail 4 Apr 2006 72,371 miles

Exhaust emissions carbon monoxide content excessive (7.3.B.1a)

Rear Fuel hose leaking (7.2.3)

Fail 1 Apr 2006 72,351 miles

Exhaust emissions carbon monoxide content excessive (7.3.B.1a)

Fuel system component leaking (7.2.3)

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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F166 MNU is a 1988 Mercedes-benz 420 in Black with a 4,196cc petrol engine. This vehicle has been through 26 MOT tests with a personal pass rate of 65.4%.

Across all 1988 Mercedes-benz 420 models, the average MOT pass rate is 75.3% with a typical mileage of 101,568 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 F166 MNU, 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 38 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 F166 MNU?

You can check the full history of F166 MNU by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was F166 MNU registered?

F166 MNU is a 1988 Mercedes-benz 420, first registered on 30 December 1988.

Is F166 MNU safe to buy?

The MOT history for F166 MNU shows 26 tests with a 65.4% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does F166 MNU 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 F166 MNU. 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.