CarVerify

Free Car Check

KN66 UNH

2017 Mercedes-benz B-class

Blue Diesel 2143cc
Search another vehicle

MOT Status

Expired
Expires16 Sep 2026
Tests9 (7 pass, 2 fail)
Pass rate77.8%

Mileage

48,343 mi
Last recorded48,343 miles
Recorded on10 Sep 2025
Typical for 2017 Mercedes-benz B-class35,198 mi

Above average mileage for this year

4 checks still locked for this Mercedes-benz
Stolen
Finance
Write-off
Keepers
Unlock full report — £4.99
Instant £30k guarantee
or single check £14.99

Not all car check providers offer a guarantee. Don't risk buying from services that can't back their data. CarVerify reports include a £30,000 finance data guarantee.

Vehicle Details

RegistrationKN66 UNH
MakeMercedes-benz
ModelB-class
Year2017
ColourBlue
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

7 pass 2 fail
Pass 10 Sep 2025 48,343 miles

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

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

Fail 10 Sep 2025 48,343 miles

Nearside Rear Inner Brake disc significantly and obviously worn (1.1.14 (a) (i))

Offside Rear Inner Brake disc significantly and obviously worn (1.1.14 (a) (i))

Nearside Front Inner Tyre has a lump, caused by separation or partial failure of its structure (5.2.3 (d) (ii)) DANGEROUS

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

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

Pass 16 Sep 2024 45,455 miles
Fail 16 Sep 2024 45,455 miles

Windscreen wiper does not clear the windscreen effectively o/s & n/s (3.4 (b) (ii))

Pass 8 Sep 2023 36,981 miles

Front Brake disc worn, pitted or scored, but not seriously weakened o/s & n/s (1.1.14 (a) (ii))

Pass 23 Aug 2022 29,004 miles
Pass 17 Sep 2021 21,141 miles

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

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

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

Pass 17 Dec 2020 18,372 miles
Pass 19 Dec 2019 16,841 miles

How Reliable is the Mercedes-benz B-class?

Based on 984,871 MOT tests across 77,700 vehicles.

79.4%
Pass Rate
5,590
Miles/Year
21
Year Lifespan
77,700
On UK Roads

Top MOT Failure Points

Tyre tread depth below requirements of 1.6mm 6,159
coil spring broken 5,250
Full Mercedes-benz B-class reliability report

Don't risk it. Know before you buy.

Not all vehicle check providers are the same. Some don't offer a data guarantee, which means if their information is wrong, you're on your own. Every CarVerify report is backed by a £30,000 finance data guarantee.

£30k guarantee Instant results Cancel anytime

KN66 UNH is a 2017 Mercedes-benz B-class in Blue with a 2,143cc diesel engine. This vehicle has been through 9 MOT tests with a personal pass rate of 77.8%.

Across all 2017 Mercedes-benz B-class models, the average MOT pass rate is 87.3% with a typical mileage of 35,198 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 B-class fails its MOT is tyre tread depth below requirements of 1.6mm, accounting for 6,159 recorded failures. If you're considering buying KN66 UNH, it's worth having these areas checked by a mechanic before committing.

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

Frequently Asked Questions

How do I check the history of KN66 UNH?

You can check the full history of KN66 UNH by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was KN66 UNH registered?

KN66 UNH is a 2017 Mercedes-benz B-class, first registered on 13 January 2017.

Is KN66 UNH safe to buy?

The MOT history for KN66 UNH shows 9 tests with a 77.8% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does KN66 UNH 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 KN66 UNH. 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.