In-depth reviews

Mercedes SLC convertible - MPG, running costs & CO2 (2016-2021)

The diesel Mercedes SLC has impressively low running costs

Carbuyer Rating

2.8 out of 5

Owners Rating

2.5 out of 5

Read owner reviews
MPG, running costs & CO2 Rating

3.0 out of 5

Diesel is the way to go if you want your Mercedes SLC to be cheap to run. The car uses Mercedes’ long-standing 2.1-litre diesel engine – not the new one from the latest Mercedes E-Class saloon – but it boasts impressive fuel economy of 64.2mpg and CO2 emissions of just 114g/km all the same.

All SLC models come with fuel-saving technology, including stop-start, as well as a more economy-focused setting in the car’s Dynamic Select system. The Mercedes SLC is predicted to hold onto its value well, too. The SLK was particularly impressive in this area, with some of the lowest depreciation of any car on sale. The diesel model is a star performer in this area.

Mercedes SLC MPG & CO2

The economy hero of the Mercedes SLC range is the SLC 250d diesel. It returns a claimed average of 64.2mpg and CO2 emissions of 114g/km.

The petrol engines are less impressive. The entry-level SLC 200 emits 150g/km of CO2 and should return 43.5mpg. Oddly, the more powerful SLC 300 is more efficient than the SLC 200, emitting 138g/km of CO2 and returning an average of 47.1mpg.

As you would expect, the Mercedes-AMG SLC 43 is the most expensive to run, with CO2 emissions of 178g/km and 36.2mpg average fuel economy.

Every SLC costs £140 a year in road tax, unless the price (including options) exceeds £40,000, in which case there's a surcharge of £310 in years two to six, bringing the total to £450 during this period. 

Insurance group

Most versions of the SLC fall into insurance groups 41-45, while the higher-powered AMG version sits in group 47. This is similar to the Porsche 718 Boxster; the standard 2.0-litre 718 is in group 44, while the 2.5-litre S model is in group 46. 

Warranty

As with all Mercedes cars, the SLC has a three-year/unlimited-mileage warranty.

Servicing

Service intervals alternate between major and minor services, once a year or every 15,000, whichever comes about first. Mercedes offers a Service Care package that provides servicing cover for a fixed monthly fee of £35.

Most Popular

Best new car deals 2021
Fiat 500 electric
Deals
24 Sep 2021

Best new car deals 2021

Electric Citroen Ami to launch in the UK next year
2022 Citroen Ami
Citroen Ami
21 Sep 2021

Electric Citroen Ami to launch in the UK next year

Top 10 best small estates 2021
Skoda Octavia Estate
Skoda Octavia Estate
22 Sep 2021

Top 10 best small estates 2021

Tips & advice

View All
Car dashboard warning lights: the complete guide
Car dashboard symbols and meanings
Tips and advice
10 Aug 2021

Car dashboard warning lights: the complete guide

Electric car charging stations: a complete guide
Electric car charging station
Tips and advice
3 Jun 2021

Electric car charging stations: a complete guide

PCP vs HP – which type of car finance is right for you?
PCP vs HP
Tips and advice
15 Jun 2021

PCP vs HP – which type of car finance is right for you?

Average speed cameras: how do they work?
Average speed cameras: how do they work?
Tips and advice
23 Jul 2021

Average speed cameras: how do they work?

Best cars

View All
Top 10 best car interiors 2021
Peugeot 208 hatchback
Best cars
25 Jun 2021

Top 10 best car interiors 2021

Top 10 best electric cars 2021
Volkswagen ID.3
Best cars
12 Aug 2021

Top 10 best electric cars 2021

Top 10 best cheap-to-run cars 2021
Toyota Prius front 3/4 cornering
Best cars
10 Jun 2021

Top 10 best cheap-to-run cars 2021

The UK's top 10 fastest hot hatchbacks
Mercedes AMG A45 - rear
Hot hatches
25 Jun 2021

The UK's top 10 fastest hot hatchbacks