MERCEDES S 350 L GRAND ED EXECUTIVE D A (2020)
Running costs, common problems, and reliability data based on 1,168 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
1,168
Avg Mileage
53,736 mi
Est. Annual Cost
£1,690
Is the 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 4 years old, 93% of MERCEDES S 350 L GRAND ED EXECUTIVE D As from 2020 passed their MOT first time in 2024. That's based on 1,168 tests across the UK. The average mileage at this age is 53,736 miles.
How does the 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A compare?
Mileage Analysis
The average 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A has 53,736 miles on the clock, which is well above the expected 29,600 miles for a 4-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
Best year to buy a MERCEDES S 350 L GRAND ED EXECUTIVE D A?
The most reliable year is the 2021 model with a 95% MOT pass rate, while the 2020 model has the lowest at 93%. Consider a different year if reliability is a priority.
How much does a 2020 MERCEDES S 350 L 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 L GRAND ED EXECUTIVE D A by Year
Checking a specific MERCEDES S 350 L GRAND ED EXECUTIVE D A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A
The 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A is a large car with a 2925cc diesel engine. 1,168 of these vehicles were MOT tested in 2024, making it a reasonably common sight 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 53,736 miles at 4 years old, MERCEDES S 350 L GRAND ED EXECUTIVE D A owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2020 MERCEDES S 350 L 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 L 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 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES S 350 L GRAND ED EXECUTIVE D A Reliability Trend
The MERCEDES S 350 L GRAND ED EXECUTIVE D A has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.
Buying a Used 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A
At 4 years old, the MERCEDES S 350 L 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.
Alternatives to the 2020 MERCEDES S 350 L GRAND ED EXECUTIVE D A
The MERCEDES S 350 L 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 (-3%) from 41,000 tests
- MERCEDES GLC (2018) 91% pass rate (-2%) from 40,494 tests
- FORD RANGER (2019) 87% pass rate (-6%) from 32,194 tests
- LAND ROVER RANGE ROVER VELAR (2018) 91% pass rate (-2%) from 29,640 tests