MERCEDES S 450 L GRAND ED EXEC MHEV A (2019)
Running costs, reliability data, and common problems from 37 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
97%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 30-42
2999cc Petrol
Great Choice
97% pass rate, £2042/year to run. 15 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 7 years old, 97% of MERCEDES S 450 L GRAND ED EXEC MHEV As from 2019 passed their MOT first time in 2026. That's based on 37 tests across the UK. The average mileage at this age is 75,421 miles.
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How Does It Compare?
Mileage Analysis
75,421
Average miles
51,800
Expected for age
The average 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A has 75,421 miles on the clock, which is above the expected 51,800 miles for a 7-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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About the 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A
The 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A is a large car with a 2999cc petrol engine. 37 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 10% of all 2019 cars for reliability.
With an average of 75,421 miles at 7 years old, MERCEDES S 450 L GRAND ED EXEC MHEV A owners cover more miles than the average driver.
2019 MERCEDES S 450 L GRAND ED EXEC MHEV A Fuel Costs
The 2999cc 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 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A
At 7 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. Note: with only 37 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 7 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Suspension Wear
Medium riskShock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2019 MERCEDES S 450 L GRAND ED EXEC MHEV A stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES S 450 L GRAND ED EXEC MHEV A(2019) | 97% | £1592 | £195 | Grp 30-42 | £2042 |
| BMW 5 SERIES(2018) | 91% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| LAND ROVER RANGE ROVER SPORT(2018) | 93% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| BMW X3(2019) | 92% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| MERCEDES GLC(2019) | 93% | £1592 | £190 | Grp 30-42 | £2037-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Mercedes Models
Explore other Mercedes cars or similar models in the same category.
MERCEDES A
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MERCEDES C
2017 · 1991cc Hybrid
MERCEDES A-CLASS
2017 · 1461cc Diesel
BMW 5 SERIES
2018 · 2998cc Petrol
LAND ROVER RANGE ROVER SPORT
2018 · 2995cc Petrol
BMW X3
2019 · 2998cc Petrol
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