Mercedes Benz A Class (2005)
2005 Mercedes Benz A Class
CarHunch analysed 10,316 real MOT records for the 2005 Mercedes Benz A Class.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2005 Mercedes-Benz A-Class falls slightly short of the UK average with a 76.6% pass rate, and here's the real concern: over a third (33.6%) have recorded dangerous defects during their MOT history, which is unusually high and a genuine red flag for buyers. Petrol models fare marginally better at 77.4% pass rate versus diesel at 74.9%, though neither inspires confidence.
These cars are averaging around 64,000 miles, which is reasonable for their age, but they're racking up 4.14 failures per vehicle on test—well above what you'd expect for a car of this mileage. The high advisory count (17.9 per car) points to widespread wear and deterioration across multiple systems rather than one glaring weakness. Before buying one, get a full pre-purchase inspection with particular focus on suspension geometry and brake condition, as these defects cluster heavily on this generation.
The 2005 Mercedes Benz A Class has a decent first-time pass rate (76.6%), but a higher-than-average share of vehicles have had serious defects recorded — the individual vehicle's history matters a lot here.
These stats describe 10,316 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
What tends to go wrong
Across 10,316 vehicles — figures show how many had each issue flagged at least once in their MOT history.
Data covers a 3-year window centred on 2005.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 10,316 Mercedes Benz A Class cars.
Petrol vs Diesel
Pass rate difference of 2.5 percentage points — worth knowing if you're choosing between the two.
Before you buy a 2005 Mercedes Benz A Class
Based on MOT data from 10,316 vehicles — here's what to check.
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Check the full MOT history.
33.6% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (66%) | 6,859 | 77.4% | 4.02 |
| Diesel (34%) | 3,457 | 74.9% | 4.37 |
Colour Breakdown
Based on 357,326 Mercedes Benz A Class vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2005 Mercedes Benz A Class vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2005 Mercedes Benz A Class vehicles fall between 44,120 and 71,900 miles.
2005 Mercedes Benz A Class — Still on the Road
Numbers are thinning — 24% of 2005 Mercedes Benz A Classs are still active.
Numbers are declining — 2,206 vehicles still getting MOTs in 2025 (24% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.
MOT History Averages
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Compare with another model
See how the 2005 Mercedes Benz A Class stacks up against a rival.