MERCEDES CL (2021)
Running costs, common problems, and reliability data based on 38 real MOT tests in 2024.
MOT Pass Rate
100%
Total Tests (2024)
38
Avg Mileage
14,783 mi
Est. Annual Cost
£1,582
Is the 2021 MERCEDES CL reliable?
Excellent reliability. Very few MOT failures. That's 18 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 3 years old, 100% of MERCEDES CLs from 2021 passed their MOT first time in 2024. That's based on 38 tests across the UK. The average mileage at this age is 14,783 miles.
How does the 2021 MERCEDES CL compare?
Mileage Analysis
The average 2021 MERCEDES CL has 14,783 miles on the clock, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a MERCEDES CL?
The most reliable year is the 2012 model with a 94% MOT pass rate, while the 2000 model has the lowest at 76%. The 2021 sits between the two at 100%.
How much does a 2021 MERCEDES CL 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 CL by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 100% | 38 | 14,783 mi |
| 2014 | 91% | 246 | 61,866 mi |
| 2013 | 87% | 276 | 61,865 mi |
| 2012 | 94% | 172 | 66,464 mi |
| 2011 | 89% | 159 | 73,701 mi |
| 2010 | 85% | 150 | 77,076 mi |
| 2009 | 81% | 119 | 86,705 mi |
| 2008 | 80% | 241 | 78,575 mi |
| 2007 | 88% | 468 | 104,864 mi |
| 2006 | 89% | 79 | 94,133 mi |
| 2005 | 93% | 70 | 94,005 mi |
| 2004 | 87% | 112 | 79,723 mi |
| 2003 | 86% | 250 | 105,101 mi |
| 2002 | 82% | 330 | 94,742 mi |
| 2001 | 78% | 116 | 116,951 mi |
| 2000 | 76% | 78 | 91,007 mi |
| 1999 | 78% | 72 | 16,669 mi |
| 1998 | 79% | 113 | 101,277 mi |
| 1997 | 92% | 118 | 104,546 mi |
Checking a specific MERCEDES CL?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MERCEDES CL
The 2021 MERCEDES CL is a small family car with a 1400cc petrol engine. 38 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 2% of all 2021 cars for reliability.
With an average of 14,783 miles at 3 years old, MERCEDES CL owners tend to use this car less than the typical driver.
2021 MERCEDES CL Fuel Costs
The 1400cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,137 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MERCEDES CL?
Total estimated annual running cost is £1,582 (£132/month), broken down as £1137 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 100% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES CL Reliability Trend
Newer MERCEDES CLs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.
Buying a Used 2021 MERCEDES CL
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. If you're flexible on year, the 2012 model has the highest pass rate at 94%. Note: with only 38 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 MERCEDES CL
The MERCEDES CL is actually the most reliable option among similar petrol small family cars from this era. Here are comparable petrol cars with similar engines:
- FORD FIESTA (2019) 91% pass rate (-9%) from 124,950 tests
- VOLKSWAGEN GOLF (2019) 92% pass rate (-8%) from 89,653 tests
- VAUXHALL CORSA (2019) 88% pass rate (-12%) from 68,639 tests
- NISSAN QASHQAI (2020) 93% pass rate (-7%) from 52,321 tests