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Mercedes CDI MOT Check

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

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75.0%

Avg Pass Rate

-2.7%

vs Mercedes Avg

1

Year Ranges

Good

Reliability

Mercedes CDI — MOT Reliability Overview

The Mercedes CDI has an average MOT pass rate of 75.0%, which is 2.7 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 CDI on the road.

Before buying a used Mercedes CDI, 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 CDI performs at MOT across different model years.

0

Based on 12 vehicles

75.0%Good
Mercedes average: 77.7%
Mileage at 5yr

110k 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 CDI

Mercedes CDI — Frequently Asked Questions

Common questions about the Mercedes CDI MOT and reliability.

What is the MOT pass rate for the Mercedes CDI?
The average MOT pass rate for the Mercedes CDI is 75.0% 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 CDI?
Check the detailed breakdown on this page for specific failure data by year range.
Is the Mercedes CDI reliable?
With an average MOT pass rate of 75.0%, the Mercedes CDI is rated as "Good" for reliability. This is a strong result suggesting good build quality and fewer common defects.
How do I check the MOT history of a Mercedes CDI?
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 CDI?
Typical mileage for the Mercedes CDI: 109,594 miles at 5 years. Use these benchmarks when evaluating a used CDI to spot vehicles with unusually high or low mileage.

Check Your Mercedes CDI's MOT History

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

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