Mercedes SLC (2017)

Estimated running costs and MOT pass rates from 7,762 MOT tests in 2024.

Annual Cost

£2,413

£201/month

MOT Pass Rate

90%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 30-42

2996cc Petrol

Great Choice

90% pass rate, £2,413/year to run. 8 points above average.

Buying this car? Check for finance, write-offs & theft

£4.99

Check a specific Mercedes SLC

Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.

Petrol2996cc9 years old7,762 tests36k miles avg

Annual Running Costs

Fuel (Petrol, 2996cc)

~30 mpg

£1,958

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,413

Per month£201/mo

Per week£46/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

90% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 8 points above the average of 82% across all models in our data.

90% of MOT tests on Mercedes SLCs from 2017 ended in a pass in 2024, when they were about 7 years old. That's based on 7,762 tests across the UK, retests included. The average mileage recorded at those tests was 35,860 miles.

Got a Mercedes SLC you're looking at?

Enter the reg plate to check its specific MOT history, mileage, and health score.

How Does It Compare?

Rank among 2017 models206th of 540(top half)

Rank among Mercedes models613th of 1,376(top half)

vs average of all models+8%(82% avg)

vs 2017 models average+3%(87% avg)

vs Mercedes average+3%(87% avg)

Mileage Analysis

35,860

Average miles

51,800

Expected for age

The average 2017 Mercedes SLC had 35,860 miles on the clock at its 2024 MOT, which is below the expected 51,800 miles for a 7-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Looking at a specific Mercedes SLC?

Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.

Best Year to Buy?

Of the years with at least 100 tests, the 2019 model has the highest MOT pass rate at 94%, while the 2016 model has the lowest at 89%. The 2017 scores 90%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Mercedes SLC by Year

Year	Pass Rate	Tests	Avg Mileage
2021	98%	87	13,659 mi
2020	94%	169	20,514 mi
2019	94%	1,972	21,880 mi
2018	92%	3,335	28,655 mi
2017	90%	7,762	35,860 mi
2016	89%	5,408	41,461 mi

Similar Cars to Consider

BMW 5 Series

2018 · 2998cc Petrol

£2,413/year

91%

+1%

Land Rover Range Rover Sport

2018 · 2995cc Petrol

£2,413/year

93%

+3%

BMW X3

2019 · 2998cc Petrol

£2,413/year

92%

+2%

Mercedes GLC

2019 · 2996cc Petrol

£2,413/year

93%

+3%

Check a Specific Mercedes SLC

Enter a reg plate to get the full MOT history, health score, and mileage verification.

Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.

About the 2017 Mercedes SLC

The 2017 Mercedes SLC is a premium performance car. Our records list a 2996cc petrol engine, though engines vary between versions. 7,762 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. Among all models from 2017, the average MOT pass rate is 87%, and this model beats that benchmark.

With an average of 35,860 miles recorded at its 2024 MOT tests, Mercedes SLC owners tend to use this car less than the typical driver.

2017 Mercedes SLC Fuel Costs

The 2996cc 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 £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 2017 Mercedes SLC?

Total estimated annual running cost is £2,413 (£201/month), broken down as £1,958 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Mercedes SLC Reliability Trend

Newer Mercedes SLCs pass their MOT more often than older ones, by 4 percentage points on average, which is mostly down to age and wear.

Buying a Used 2017 Mercedes SLC

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 2019 model has the highest pass rate at 94%. With 7,762 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Timing Chain / Belt

Watch out

At 9 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 risk

Larger 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 risk

Shock 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 risk

Always 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 2017 Mercedes SLC stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Mercedes SLC(2017)	90%	£1,958	£200	Grp 30-42	£2,413
BMW 5 Series(2018)	91%	£1,958	£200	Grp 30-42	£2,413same
Land Rover Range Rover Sport(2018)	93%	£1,958	£200	Grp 30-42	£2,413same
BMW X3(2019)	92%	£1,958	£200	Grp 30-42	£2,413same
Mercedes GLC(2019)	93%	£1,958	£200	Grp 30-42	£2,413same

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2017 Mercedes SLC

Is the 2017 Mercedes SLC reliable?

Excellent reliability. Very few MOT failures. 90% of MOT tests on 2017 Mercedes SLCs ended in a pass, from 7,762 tests (DVSA MOT data for tests in 2024, retests included). That's 8 points above the average of 82% across all models in the same data.

How much does a 2017 Mercedes SLC cost to run?

Our estimate is £2,413 a year (£201 a month): £1,958 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2017 Mercedes SLC?

90% of 7,762 MOT tests on the 2017 Mercedes SLC ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 206th of 540 models first registered in 2017 (top half).

Which year Mercedes SLC has the best MOT pass rate?

Of the years with at least 100 tests, the 2019 Mercedes SLC has the highest MOT pass rate at 94% and the 2016 the lowest at 89%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2017 Mercedes SLC?

The average mileage recorded at MOT tests on the 2017 Mercedes SLC is 35,860 miles, which is below the expected 51,800 miles for a 7-year-old car. This suggests lighter use than average, which generally means less wear on major components.