MERCEDES CLS (2009)
Running costs, common problems, and reliability data based on 2,541 real MOT tests in 2024.
MOT Pass Rate
78%
Total Tests (2024)
2,541
Avg Mileage
114,393 mi
Est. Annual Cost
£2,050
Is the 2009 MERCEDES CLS reliable?
Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 15 years old, 78% of MERCEDES CLSs from 2009 passed their MOT first time in 2024. That's based on 2,541 tests across the UK. The average mileage at this age is 114,393 miles.
How does the 2009 MERCEDES CLS compare?
Mileage Analysis
The average 2009 MERCEDES CLS has 114,393 miles on the clock, which is in line with the expected 111,000 miles for a 15-year-old car, suggesting normal everyday use.
Best year to buy a MERCEDES CLS?
The most reliable year is the 2019 model with a 90% MOT pass rate, while the 2009 model has the lowest at 78%. Consider a different year if reliability is a priority.
How much does a 2009 MERCEDES CLS cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES CLS by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 90% | 149 | 25,838 mi |
| 2020 | 85% | 708 | 33,613 mi |
| 2019 | 90% | 2,938 | 42,687 mi |
| 2018 | 89% | 2,552 | 49,336 mi |
| 2017 | 87% | 3,475 | 61,581 mi |
| 2016 | 87% | 4,786 | 69,870 mi |
| 2015 | 87% | 6,871 | 81,130 mi |
| 2014 | 85% | 4,192 | 86,883 mi |
| 2013 | 83% | 7,096 | 95,825 mi |
| 2012 | 83% | 2,664 | 97,844 mi |
| 2011 | 82% | 2,675 | 100,976 mi |
| 2010 | 79% | 2,428 | 110,846 mi |
| 2009 | 78% | 2,541 | 114,393 mi |
| 2008 | 78% | 2,982 | 122,863 mi |
| 2007 | 78% | 3,915 | 122,774 mi |
| 2006 | 79% | 3,184 | 117,836 mi |
| 2005 | 81% | 1,944 | 108,622 mi |
Checking a specific MERCEDES CLS?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2009 MERCEDES CLS
The 2009 MERCEDES CLS is a large car with a 2987cc diesel engine. 2,541 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. Among all cars from 2009, the average MOT pass rate is 75%, and this model beats that benchmark.
With an average of 114,393 miles at 15 years old, MERCEDES CLS owners drive about as much as the UK average.
2009 MERCEDES CLS Fuel Costs
The 2987cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2009 MERCEDES CLS?
Total estimated annual running cost is £2,050 (£171/month), broken down as £1245 fuel, £250 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 78% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES CLS Reliability Trend
Newer MERCEDES CLSs show better MOT pass rates than older ones, with an average improvement of 7 percentage points.
Buying a Used 2009 MERCEDES CLS
At 15 years old, the MERCEDES CLS is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age.
Alternatives to the 2009 MERCEDES CLS
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable diesel cars with similar engines:
- BMW 3 SERIES (2008) 80% pass rate (+2%) from 48,705 tests
- AUDI A4 (2011) 82% pass rate (+4%) from 26,901 tests
- AUDI A5 (2010) 82% pass rate (+4%) from 22,181 tests
- JAGUAR XF (2010) 80% pass rate (+2%) from 19,704 tests