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Mercedes B Class MOT Check

MOT pass rates, common failures, and reliability data for the Mercedes B Class. Check any B Class by registration number below.

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70.7%

Avg Pass Rate

-7.0%

vs Mercedes Avg

1

Year Ranges

Average

Reliability

Mercedes B Class — MOT Reliability Overview

The Mercedes B Class has an average MOT pass rate of 70.7%, which is 7.0 percentage points below the Mercedes brand average of 77.7%. This is a reasonable result that reflects typical UK reliability standards. Regular servicing and addressing advisories promptly will help keep your B Class on the road.

Before buying a used Mercedes B Class, we recommend checking the full MOT history, write-off status, outstanding finance, and stolen vehicle status. These checks can be done for free using the registration number.

MOT Pass Rate by Year

How the Mercedes B Class performs at MOT across different model years.

0

Based on 41 vehicles

70.7%Average
Mercedes average: 77.7%
Mileage at 5yr

87k mi

Other Mercedes Models

Compare MOT reliability across Mercedes models.

Mercedes 316cdi

94.7% pass rate

Mercedes 207d

71.4% pass rate

Mercedes Hymer

76.6% pass rate

Mercedes 609d

66.7% pass rate

Mercedes Ml 250

80.5% pass rate

Mercedes SLS

93.8% pass rate

Useful MOT Guides

Common MOT Failures

The most common reasons UK vehicles fail their MOT — and how to prepare.

MOT Checklist

Pre-MOT checklist to improve your chances of passing first time.

Advisory vs Failure

Understanding the difference between MOT advisories and failures.

See detailed fault analysis for Mercedes B Class

Mercedes B Class — Frequently Asked Questions

Common questions about the Mercedes B Class MOT and reliability.

What is the MOT pass rate for the Mercedes B Class?
The average MOT pass rate for the Mercedes B Class is 70.7% compared to the Mercedes average of 77.7%. Pass rates vary by year — check the year-by-year breakdown on this page for details.
What are the most common MOT failures on a Mercedes B Class?
Check the detailed breakdown on this page for specific failure data by year range.
Is the Mercedes B Class reliable?
With an average MOT pass rate of 70.7%, the Mercedes B Class is rated as "Average" for reliability. This is around average — regular maintenance is recommended to avoid common failure points.
How do I check the MOT history of a Mercedes B Class?
Enter the vehicle's registration number in the search box at the top of this page. You will instantly see the complete MOT history including every test result, mileage readings, advisories, and dangerous defects — completely free.
What mileage should I expect on a Mercedes B Class?
Typical mileage for the Mercedes B Class: 87,385 miles at 5 years. Use these benchmarks when evaluating a used B Class to spot vehicles with unusually high or low mileage.

Check Your Mercedes B Class's MOT History

Enter the registration number for the full MOT history — free and instant.

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