MERCEDES SL (2009)
Running costs, common problems, and reliability data based on 1,222 real MOT tests in 2024.
MOT Pass Rate
87%
Total Tests (2024)
1,222
Avg Mileage
63,020 mi
Est. Annual Cost
£2,247
Is the 2009 MERCEDES SL reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 15 years old, 87% of MERCEDES SLs from 2009 passed their MOT first time in 2024. That's based on 1,222 tests across the UK. The average mileage at this age is 63,020 miles.
How does the 2009 MERCEDES SL compare?
Mileage Analysis
The average 2009 MERCEDES SL has 63,020 miles on the clock, which is below the expected 111,000 miles for a 15-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a MERCEDES SL?
The most reliable year is the 2019 model with a 97% MOT pass rate, while the 1990 model has the lowest at 81%. The 2009 sits between the two at 87%.
How much does a 2009 MERCEDES SL 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 SL by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2019 | 97% | 851 | 19,987 mi |
| 2018 | 93% | 1,022 | 25,750 mi |
| 2017 | 94% | 1,847 | 30,630 mi |
| 2016 | 95% | 2,240 | 36,109 mi |
| 2015 | 92% | 2,222 | 40,591 mi |
| 2014 | 92% | 2,892 | 47,357 mi |
| 2013 | 89% | 2,796 | 49,450 mi |
| 2012 | 90% | 1,136 | 50,476 mi |
| 2011 | 92% | 579 | 50,602 mi |
| 2010 | 88% | 955 | 62,402 mi |
| 2009 | 87% | 1,222 | 63,020 mi |
| 2008 | 90% | 1,940 | 65,610 mi |
| 2007 | 88% | 1,792 | 71,215 mi |
| 2006 | 87% | 1,832 | 73,640 mi |
| 2005 | 88% | 2,430 | 75,394 mi |
| 2004 | 88% | 4,036 | 77,676 mi |
| 2003 | 86% | 5,173 | 75,808 mi |
| 2002 | 88% | 2,083 | 74,421 mi |
| 2001 | 90% | 528 | 78,534 mi |
| 2000 | 86% | 955 | 84,195 mi |
| 1999 | 87% | 1,617 | 84,924 mi |
| 1998 | 86% | 2,018 | 89,595 mi |
| 1997 | 87% | 2,117 | 93,418 mi |
| 1996 | 88% | 1,778 | 93,971 mi |
| 1995 | 85% | 1,627 | 99,248 mi |
| 1994 | 88% | 1,244 | 93,271 mi |
| 1993 | 88% | 462 | 85,167 mi |
| 1992 | 87% | 312 | 90,571 mi |
| 1991 | 86% | 288 | 78,703 mi |
| 1990 | 81% | 186 | 88,429 mi |
Checking a specific MERCEDES SL?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2009 MERCEDES SL
The 2009 MERCEDES SL is a performance with a 5461cc petrol engine. 1,222 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 17% of all 2009 cars for reliability.
With an average of 63,020 miles at 15 years old, MERCEDES SL owners tend to use this car less than the typical driver.
2009 MERCEDES SL Fuel Costs
The 5461cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2009 MERCEDES SL?
Total estimated annual running cost is £2,247 (£187/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES SL Reliability Trend
Newer MERCEDES SLs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.
Buying a Used 2009 MERCEDES SL
At 15 years old, the MERCEDES SL 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. If you're flexible on year, the 2019 model has the highest pass rate at 97%.
Alternatives to the 2009 MERCEDES SL
The MERCEDES SL is actually the most reliable option among similar petrol performances from this era. Here are comparable petrol cars with similar engines:
- LAND ROVER RANGE ROVER SPORT (2011) 85% pass rate (-2%) from 13,658 tests
- AUDI A6 (2009) 81% pass rate (-6%) from 8,341 tests
- MERCEDES S-CLASS (2011) 87% pass rate (same) from 2,202 tests
- JAGUAR XKR (2010) 87% pass rate (same) from 1,814 tests