MERCEDES S 350 GRAND ED EXECUTIVE D A (2020)
Running costs, common problems, and reliability data based on 78 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
78
Avg Mileage
40,407 mi
Est. Annual Cost
£1,690
Is the 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 4 years old, 94% of MERCEDES S 350 GRAND ED EXECUTIVE D As from 2020 passed their MOT first time in 2024. That's based on 78 tests across the UK. The average mileage at this age is 40,407 miles.
How does the 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A compare?
Mileage Analysis
The average 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A has 40,407 miles on the clock, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
How much does a 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A 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 S 350 GRAND ED EXECUTIVE D A by Year
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About the 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A
The 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A is a large car with a 2925cc diesel engine. 78 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2020, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 40,407 miles at 4 years old, MERCEDES S 350 GRAND ED EXECUTIVE D A owners cover more miles than the average driver.
2020 MERCEDES S 350 GRAND ED EXECUTIVE D A Fuel Costs
The 2925cc 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).
What does it cost to own a 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A?
Total estimated annual running cost is £1,690 (£141/month), broken down as £1245 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A
At 4 years old, the MERCEDES S 350 GRAND ED EXECUTIVE D A offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 78 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2020 MERCEDES S 350 GRAND ED EXECUTIVE D A
The MERCEDES S 350 GRAND ED EXECUTIVE D A is actually the most reliable option among similar diesel large cars from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-4%) from 41,000 tests
- MERCEDES GLC (2018) 91% pass rate (-3%) from 40,494 tests
- FORD RANGER (2019) 87% pass rate (-7%) from 32,194 tests
- LAND ROVER RANGE ROVER VELAR (2018) 91% pass rate (-3%) from 29,640 tests