How much does a 2014 MERCEDES SLK cost to run?

Estimated annual running cost is £2,757 (£230/month), including £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 2014 MERCEDES SLK?

The 2014 MERCEDES SLK has a 87% MOT pass rate based on 11,284 tests in 2026. This ranks 237 out of 562 cars from 2014.

Which year MERCEDES SLK is most reliable?

The 2016 MERCEDES SLK has the highest MOT pass rate at 89%. The least reliable year is 1996 at 76%.

MERCEDES SLK (2014)

Q: Is the 2014 MERCEDES SLK reliable?

Good reliability. Occasional issues but generally solid. 87% of MERCEDES SLKs from 2014 passed their MOT first time in 2026, based on 11,284 tests. That's 5 points above the national average of 82%.

Q: What is the average mileage for a 2014 MERCEDES SLK?

The average mileage for a 2014 MERCEDES SLK is 55,581 miles, which is below the expected 88,800 miles for a 12-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 11,284 real MOT tests.

Annual Cost

£2,757

£230/month

MOT Pass Rate

87%

Good

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

5461cc Petrol

Solid Option

87% pass rate, £2757/year to run. 5 points above average.

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Petrol5461cc12 years old11,284 tests56k miles avg

Annual Running Costs

Fuel (Petrol, 5461cc)

~30 mpg

£1,592

Road Tax

Based on 5461cc

£760

MOT Test

£55

Predicted Repairs

£350

Total per year£2,757

Per month£230/mo

Per week£53/wk

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

87% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.

At 12 years old, 87% of MERCEDES SLKs from 2014 passed their MOT first time in 2026. That's based on 11,284 tests across the UK. The average mileage at this age is 55,581 miles.

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How Does It Compare?

Rank among 2014 cars237th of 562(top 42%)

Rank among MERCEDES models793th of 1,408(top 56%)

vs national average+5%(82% avg)

vs 2014 cars average+6%(81% avg)

vs MERCEDES average+0%(87% avg)

Mileage Analysis

55,581

Average miles

88,800

Expected for age

The average 2014 MERCEDES SLK has 55,581 miles on the clock, which is below the expected 88,800 miles for a 12-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

The most reliable year is the 2016 model with a 89% MOT pass rate, while the 1996 model has the lowest at 76%. The 2014 sits between the two at 87%.

MERCEDES SLK by Year

Year	Pass Rate	Tests	Avg Mileage
2016	89%	2,572	42,977 mi
2015	87%	11,055	48,710 mi
2014	87%	11,284	55,581 mi
2013	85%	11,106	62,322 mi
2012	84%	13,361	64,940 mi
2011	85%	5,660	61,469 mi
2010	80%	4,472	66,541 mi
2009	81%	5,347	71,532 mi
2008	80%	6,876	75,187 mi
2007	79%	7,700	77,695 mi
2006	79%	7,884	80,213 mi
2005	78%	10,305	82,791 mi
2004	78%	6,598	84,132 mi
2003	78%	3,327	85,438 mi
2002	81%	3,692	87,295 mi
2001	82%	4,005	90,848 mi
2000	79%	3,545	90,918 mi
1999	79%	4,295	87,626 mi
1998	79%	3,523	89,671 mi
1997	81%	2,190	90,802 mi
1996	76%	126	98,709 mi

Similar Cars to Consider

JAGUAR F-TYPE

2014 · 5000cc Petrol

£2,097/year

94%

+7%

JAGUAR XK

2014 · 5000cc Petrol

£2,097/year

93%

+6%

AUDI R8

2016 · 5204cc Petrol

£2,097/year

97%

+10%

BENTLEY BENTAYGA

2016 · 5950cc Petrol

£2,097/year

97%

+10%

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About the 2014 MERCEDES SLK

The 2014 MERCEDES SLK is a performance with a 5461cc petrol engine. 11,284 of these vehicles were MOT tested in 2026, making it one of the most commonly tested cars on UK roads. Among all cars from 2014, the average MOT pass rate is 81%, and this model beats that benchmark.

With an average of 55,581 miles at 12 years old, MERCEDES SLK owners tend to use this car less than the typical driver.

2014 MERCEDES SLK Fuel Costs

The 5461cc 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 2014 MERCEDES SLK?

Total estimated annual running cost is £2,757 (£230/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.

MERCEDES SLK Reliability Trend

Newer MERCEDES SLKs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.

Buying a Used 2014 MERCEDES SLK

At 12 years old, the MERCEDES SLK is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2016 model has the highest pass rate at 89%. With 11,284 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

Based on the 2014 MERCEDES SLK's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 12 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.

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

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 2014 MERCEDES SLK stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES SLK(2014)	87%	£1592	£760	Grp 35-50	£2757
JAGUAR F-TYPE(2014)	94%	£1592	£250	Grp 35-50	£2097-£660
JAGUAR XK(2014)	93%	£1592	£250	Grp 35-50	£2097-£660
AUDI R8(2016)	97%	£1592	£250	Grp 35-50	£2097-£660
BENTLEY BENTAYGA(2016)	97%	£1592	£250	Grp 35-50	£2097-£660

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.