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M121 GMF

2004 Mercedes-benz Slk

Black Petrol 1798cc
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MOT Status

Valid
Expires17 Nov 2026
Tests29 (19 pass, 10 fail)
Pass rate65.5%

Mileage

93,059 mi
Last recorded93,059 miles
Recorded on18 Nov 2025
Typical for 2004 Mercedes-benz Slk57,472 mi

Significantly above average — investigate

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

RegistrationM121 GMF
MakeMercedes-benz
ModelSlk
Year2004
ColourBlack
Fuel typePetrol
Engine1,798cc

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

19 pass 10 fail
Pass 18 Nov 2025 93,059 miles

Nearside Front Headlamp lens slightly defective (4.1.1 (b) (i))

Offside Front Headlamp lens slightly defective (4.1.1 (b) (i))

Pass 14 Nov 2024 92,751 miles
Fail 12 Nov 2024 92,749 miles

Offside Front Lower Suspension arm pin or bush excessively worn Inner bush (5.3.4 (a) (i))

Offside Front Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))

Pass 14 Nov 2023 89,715 miles

Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Fail 8 Nov 2023 89,713 miles

Nearside Front Headlamp aim too high (4.1.2 (a))

Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii))

Offside Front Headlamp aim too far to the right (4.1.2 (a))

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

Rear All position lamps light intensity significantly reduced (4.2.3 (a) (ii))

Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Fail 26 Oct 2023 89,609 miles

Nearside Front Coil spring fractured or broken (5.3.1 (b) (i))

Rear Position lamp light intensity significantly reduced l.e.d lights fitted to both rear side lights not adequately lit (4.2.3 (a) (ii))

Offside Front Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i))

Rear Sub-frame corroded but not seriously weakened (5.3.3 (b) (i))

Pass 13 Oct 2022 86,078 miles

Rear Sub-frame corroded but not seriously weakened (5.3.3 (b) (i))

Pass 24 Nov 2021 83,774 miles
Fail 10 Nov 2021 83,740 miles

Nearside Front Lower Suspension component ball joint excessively worn (5.3.4 (a) (i))

Rear Exhaust mounting defective (6.1.2 (a))

Pass 5 Nov 2020 81,111 miles
Fail 23 Oct 2020 81,109 miles

Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))

Nearside Track rod end ball joint has excessive play (2.1.3 (b) (i))

Pass 26 Sep 2019 77,894 miles

Brake pipe corroded, covered in grease or other material Both front to rear & both front (1.1.11 (c))

Front Brake pad(s) wearing thin (1.1.13 (a) (ii))

Pass 2 Oct 2018 74,747 miles
Pass 28 Sep 2017 69,317 miles

Brake pipe slightly corroded front to rear (3.6.B.2c)

Front Tyre worn close to the legal limit just over 1.6mm (4.1.E.1)

Nearside Front Lower Suspension arm rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

Nearside Rear Nail in tyre ()

front tyres wearing on edges

Pass 29 Sep 2016 64,755 miles

Brake pipe slightly corroded front to rear (3.6.B.2c)

Nearside Front Tyre worn close to the legal limit (4.1.E.1)

both front tyres starting to perish

Fail 29 Sep 2016 64,755 miles

Offside Front Lower Suspension arm has excessive play in a ball joint (2.4.G.2)

Brake pipe slightly corroded front to rear (3.6.B.2c)

Nearside Front Tyre worn close to the legal limit (4.1.E.1)

both front tyres starting to perish

Pass 15 Oct 2015 60,618 miles
Pass 16 Oct 2014 58,000 miles
Fail 16 Oct 2014 57,995 miles

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

Pass 28 Sep 2013 55,915 miles

Centre Exhaust has a minor leak of exhaust gases (7.1.2)

Pass 3 Oct 2012 54,489 miles

Service brake: service brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.7)

Pass 29 Sep 2011 52,652 miles

Rear Tyre worn close to the legal limit (4.1.E.1)

Pass 1 Oct 2010 48,064 miles
Fail 30 Sep 2010 48,060 miles

Offside Rear coil spring fractured (2.4.C.1a) DANGEROUS

Pass 5 Oct 2009 44,159 miles
Pass 25 Oct 2008 40,285 miles
Fail 24 Oct 2008 40,281 miles

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

Nearside Front brake disc in such a condition that it is seriously weakened (3.5.1i)

Offside Front brake disc in such a condition that it is seriously weakened (3.5.1i)

Pass 17 Oct 2007 35,440 miles
Fail 12 Oct 2007 35,377 miles

Front Exhaust has part of the system excessively deteriorated (7.1.1a)

How Reliable is the Mercedes-benz Slk?

Based on 1,335,553 MOT tests across 81,472 vehicles.

80.0%
Pass Rate
3,226
Miles/Year
29
Year Lifespan
81,472
On UK Roads

Top MOT Failure Points

Tyre tread depth below requirements of 1.6mm 28,060
coil spring broken 11,334
Stop lamp not working 8,797
Brake pipe excessively corroded 8,610
Tyre has ply or cords exposed 8,088
Full Mercedes-benz Slk reliability report

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M121 GMF is a 2004 Mercedes-benz Slk in Black with a 1,798cc petrol engine. This vehicle has been through 29 MOT tests with a personal pass rate of 65.5%.

Across all 2004 Mercedes-benz Slk models, the average MOT pass rate is 78.0% with a typical mileage of 57,472 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 Slk fails its MOT is tyre tread depth below requirements of 1.6mm, accounting for 28,060 recorded failures. If you're considering buying M121 GMF, it's worth having these areas checked by a mechanic before committing.

The Mercedes-benz Slk typically stays on UK roads for around 29 years. At 22 years old, this Mercedes-benz Slk is well into its expected lifespan but still has years ahead.

Frequently Asked Questions

How do I check the history of M121 GMF?

You can check the full history of M121 GMF by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was M121 GMF registered?

M121 GMF is a 2004 Mercedes-benz Slk, first registered on 16 October 2004.

Is M121 GMF safe to buy?

The MOT history for M121 GMF shows 29 tests with a 65.5% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does M121 GMF 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 M121 GMF. 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.