MERCEDES 350 (2012)
Running costs, common problems, and reliability data based on 34 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
34
Avg Mileage
90,714 mi
Est. Annual Cost
£1,750
Is the 2012 MERCEDES 350 reliable?
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 12 years old, 91% of MERCEDES 350s from 2012 passed their MOT first time in 2024. That's based on 34 tests across the UK. The average mileage at this age is 90,714 miles.
How does the 2012 MERCEDES 350 compare?
Mileage Analysis
The average 2012 MERCEDES 350 has 90,714 miles on the clock, which is in line with the expected 88,800 miles for a 12-year-old car, suggesting normal everyday use.
How much does a 2012 MERCEDES 350 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 350 by Year
Checking a specific MERCEDES 350?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2012 MERCEDES 350
The 2012 MERCEDES 350 is a large car with a 2987cc diesel engine. 34 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 17% of all 2012 cars for reliability.
With an average of 90,714 miles at 12 years old, MERCEDES 350 owners drive about as much as the UK average.
2012 MERCEDES 350 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 2012 MERCEDES 350?
Total estimated annual running cost is £1,750 (£146/month), broken down as £1245 fuel, £250 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2012 MERCEDES 350
At 12 years old, the MERCEDES 350 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. Note: with only 34 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2012 MERCEDES 350
The MERCEDES 350 is actually the most reliable option among similar diesel large cars from this era. Here are comparable diesel cars with similar engines:
- LAND ROVER RANGE ROVER (2013) 88% pass rate (-3%) from 27,426 tests
- AUDI A4 (2011) 82% pass rate (-9%) from 26,901 tests
- JAGUAR XF (2014) 84% pass rate (-7%) from 26,866 tests
- AUDI A5 (2013) 85% pass rate (-6%) from 23,409 tests