CarCostCheck

MERCEDES S-CLASS (2015)

Running costs, common problems, and reliability data based on 5,513 real MOT tests in 2024.

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MOT Pass Rate

92%

Total Tests (2024)

5,513

Avg Mileage

87,325 mi

Est. Annual Cost

£2,097

Is the 2015 MERCEDES S-CLASS reliable?

Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.

At 9 years old, 92% of MERCEDES S-CLASSs from 2015 passed their MOT first time in 2024. That's based on 5,513 tests across the UK. The average mileage at this age is 87,325 miles.

How does the 2015 MERCEDES S-CLASS compare?

Rank among all 2015 cars115th out of 559(top 21%)
Rank among all MERCEDES models451th out of 1,408(top 32%)
vs national average+10% (82% avg)
vs 2015 cars average+9% (83% avg)
vs MERCEDES average+5% (87% avg)

Mileage Analysis

The average 2015 MERCEDES S-CLASS has 87,325 miles on the clock, which is above the expected 66,600 miles for a 9-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.

Best year to buy a MERCEDES S-CLASS?

The most reliable year is the 2020 model with a 95% MOT pass rate, while the 1992 model has the lowest at 72%. The 2015 sits between the two at 92%.

How much does a 2015 MERCEDES S-CLASS cost to run?

⛽Fuel (Petrol, 5980cc)
£1,592
🏛️Road Tax
£250
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£2,097
Per month£175/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

MERCEDES S-CLASS by Year

YearPass RateTestsAvg Mileage
202191%16432,036 mi
202095%54043,972 mi
201994%5,92167,860 mi
201894%6,51875,456 mi
201793%5,99073,988 mi
201691%6,81974,260 mi
201592%5,51387,325 mi
201492%3,91595,545 mi
201389%2,145108,065 mi
201288%2,817100,420 mi
201187%2,202117,628 mi
201085%2,001110,934 mi
200982%1,990114,274 mi
200884%2,232110,584 mi
200784%2,940117,418 mi
200687%2,334111,043 mi
200584%1,301132,014 mi
200482%1,158124,020 mi
200382%1,227120,882 mi
200279%720115,052 mi
200179%735107,381 mi
200081%562102,703 mi
199978%43498,447 mi
199881%522111,371 mi
199786%373107,182 mi
199683%348109,185 mi
199586%286111,087 mi
199492%140106,787 mi
199376%49112,335 mi
199272%121119,350 mi
199192%118120,508 mi
199087%125142,121 mi

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About the 2015 MERCEDES S-CLASS

The 2015 MERCEDES S-CLASS is a performance with a 5980cc petrol engine. 5,513 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 21% of all 2015 cars for reliability.

With an average of 87,325 miles at 9 years old, MERCEDES S-CLASS owners cover more miles than the average driver.

2015 MERCEDES S-CLASS Fuel Costs

The 5980cc 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 2015 MERCEDES S-CLASS?

Total estimated annual running cost is £2,097 (£175/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

MERCEDES S-CLASS Reliability Trend

Newer MERCEDES S-CLASSs show better MOT pass rates than older ones, with an average improvement of 6 percentage points.

Buying a Used 2015 MERCEDES S-CLASS

At 9 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. If you're flexible on year, the 2020 model has the highest pass rate at 95%. With 5,513 MOT tests in our data, there's strong statistical confidence in these figures.

Alternatives to the 2015 MERCEDES S-CLASS

If reliability is your priority, there are 3 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines: