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K21 ECS

2017 Mercedes-benz Cls

Black Diesel 2143cc
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MOT Status

Valid
Expires8 Feb 2027
Tests24 (15 pass, 9 fail)
Pass rate62.5%

Mileage

115,573 mi
Last recorded115,573 miles
Recorded on9 Feb 2026
Typical for 2017 Mercedes-benz Cls44,135 mi

Significantly above average — investigate

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

RegistrationK21 ECS
MakeMercedes-benz
ModelCls
Year2017
ColourBlack
Fuel typeDiesel
Engine2,143cc

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

15 pass 9 fail
Pass 9 Feb 2026 115,573 miles
Pass 11 Apr 2025 126,754 miles
Fail 9 Apr 2025 126,731 miles

Offside Rear Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))

Offside Front Tyre has ply or cords exposed 245/40/20 (5.2.3 (d) (ii)) DANGEROUS

Pass 26 Oct 2024 101,823 miles

Offside Front Tyre worn close to legal limit/worn on edge WORN ON INNER EDGE (5.2.3 (e))

Offside Rear Child Seat fitted not allowing full inspection of adult belt ()

Fail 24 Oct 2024 101,821 miles

Parking brake efficiency below requirements (1.4.2 (a) (i))

Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e)) DANGEROUS

Nearside Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))

Offside Front Tyre worn close to legal limit/worn on edge WORN ON INNER EDGE (5.2.3 (e))

Offside Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))

Offside Rear Child Seat fitted not allowing full inspection of adult belt ()

Offside Rear Tyre worn close to legal limit/worn on edge WORN ON INNER EDGE (5.2.3 (e))

Pass 12 Apr 2024 119,323 miles

Windscreen wiper blade defective (3.4 (b) (i))

Fail 11 Apr 2024 119,300 miles

Electronic parking brake control inoperative (1.1.6 (d))

Electronic parking brake warning indicates a malfunction (1.1.6 (e))

Offside Front Wheel bearing rough when rotated (5.1.3 (b) (i))

Offside Rear Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i))

Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) DANGEROUS

Windscreen wiper blade defective (3.4 (b) (i))

Pass 13 Oct 2023 85,009 miles

Offside Rear Child Seat fitted not allowing full inspection of adult belt ()

Fail 12 Oct 2023 85,009 miles

Suspension pipe leaking from compressor to valve block (5.3.5 (c))

Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e)) DANGEROUS

Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e)) DANGEROUS

Offside Rear Child Seat fitted not allowing full inspection of adult belt ()

Pass 26 Jan 2023 109,219 miles

Nearside Rear Upper Suspension arm pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Fail 24 Jan 2023 109,195 miles

Electronic parking brake warning indicates a malfunction (1.1.6 (e))

Nearside Front Lower Suspension arm pin or bush excessively worn thrust arm (5.3.4 (a) (i))

Nearside Rear Parking brake inoperative on one side (1.4.1 (a))

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

Offside Rear Parking brake inoperative on one side (1.4.1 (a))

Registration plate lamp inoperative in the case of a single lamp or all lamps (4.7.1 (b) (ii))

Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) DANGEROUS

Nearside Rear Upper Suspension arm pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Pass 28 Oct 2022 66,822 miles

Nearside Rear Tyre worn close to legal limit/worn on edge tyre on 1.8mm (5.2.3 (e))

Offside Rear Tyre worn close to legal limit/worn on edge tyre on 2.5 mm (5.2.3 (e))

Fail 20 Apr 2022 59,208 miles

Rear Suspension system inoperative (5.3.5 (a)) DANGEROUS

Pass 17 Nov 2021 96,674 miles

Nearside Front Lower Suspension arm pin or bush worn but not resulting in excessive movement thrust arm (5.3.4 (a) (i))

Offside Front Lower Suspension arm pin or bush worn but not resulting in excessive movement thrust arm (5.3.4 (a) (i))

Fail 15 Nov 2021 96,669 miles

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

Nearside Front Lower Suspension arm pin or bush worn but not resulting in excessive movement thrust arm (5.3.4 (a) (i))

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

Offside Front Lower Suspension arm pin or bush worn but not resulting in excessive movement thrust arm (5.3.4 (a) (i))

Pass 5 May 2021 47,860 miles
Pass 30 Oct 2020 86,153 miles

Nearside Front Suspension arm pin or bush worn but not resulting in excessive movement track control (5.3.4 (a) (i))

Offside Front Suspension arm pin or bush worn but not resulting in excessive movement track control (5.3.4 (a) (i))

Pass 22 Oct 2019 82,346 miles
Fail 22 Oct 2019 82,346 miles

Registration plate lamp inoperative in the case of a single lamp or all lamps (4.7.1 (b) (ii))

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

Offside Front Tyre worn close to legal limit/worn on edge 2454020 conti (5.2.3 (e))

Pass 31 Oct 2018 76,111 miles
Fail 31 Oct 2018 76,111 miles

Offside Rear Anti-roll bar linkage insecurely attached (5.3.3 (a) (i))

Pass 19 Oct 2017 69,018 miles
Pass 25 Oct 2016 56,412 miles
Pass 27 Oct 2015 46,283 miles

How Reliable is the Mercedes-benz Cls?

Based on 421,126 MOT tests across 35,498 vehicles.

79.8%
Pass Rate
6,663
Miles/Year
21
Year Lifespan
35,498
On UK Roads

Top MOT Failure Points

Tyre tread depth below requirements of 1.6mm 8,450
Tyre has ply or cords exposed 6,682
Tyre has a cut in excess of the requirements deep enough to reach the ply or cords 2,819
Suspension arm has excessive play in a ball joint 2,595
suspension has excessive play in a lower suspension ball joint 2,284
Full Mercedes-benz Cls reliability report

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K21 ECS is a 2017 Mercedes-benz Cls in Black with a 2,143cc diesel engine. This vehicle has been through 24 MOT tests with a personal pass rate of 62.5%.

Across all 2017 Mercedes-benz Cls models, the average MOT pass rate is 85.5% with a typical mileage of 44,135 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 Cls fails its MOT is tyre tread depth below requirements of 1.6mm, accounting for 8,450 recorded failures. If you're considering buying K21 ECS, it's worth having these areas checked by a mechanic before committing.

The Mercedes-benz Cls typically stays on UK roads for around 21 years. At 9 years old, this Mercedes-benz Cls is still in the earlier part of its expected life.

Frequently Asked Questions

How do I check the history of K21 ECS?

You can check the full history of K21 ECS by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was K21 ECS registered?

K21 ECS is a 2017 Mercedes-benz Cls, first registered on 29 September 2017.

Is K21 ECS safe to buy?

The MOT history for K21 ECS shows 24 tests with a 62.5% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does K21 ECS 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 K21 ECS. 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.