Mercedes C-Class Coupe - MPG, running costs & CO2

The Mercedes C-Class Coupe is relatively economical considering the performance on offer

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The latest C-Class Coupe employs some clever, fuel-saving technology first introduced on the larger Mercedes E-Class saloon, including the brand's mild-hybrid 'EQ' setup, which uses a 48v power system to provided an extended stop-start capability – the engine can even cut out temporarily when power isn't needed but the car is in motion. This, and other measures, help the C-Class to return reasonable fuel economy in spite of impressive performance figures.

Mercedes C-Class Coupe MPG & CO2

The latest C-Class Coupe has a rather simpler engine range than before; only two diesels are offered. The C220 d uses a 2.0-litre, twin-turbocharged four-cylinder engine that delivers 191bhp and up to 54.3mpg is claimed, with CO2 emissions of 121g/km for cars with the smallest 18-inch wheels. Its Benefit-in-Kind (BiK) company-car tax rating is still quite high, however, due to the extra tax on diesel.

Above that is the C300 d, which still returns 49.6mpg despite hitting 0-62mph in just six seconds. Both the C220 d and C300 d come with the option of 4MATIC four-wheel-drive, and the economy drops slightly on each model with it fitted. The price difference between two- and four-wheel-drive isn’t massive, so it’s a good option if you’d like some extra confidence in poor weather conditions.

The 1.5-litre C200 is perhaps the most interesting engine in the range, with EQ mild-hybrid technology that boosts power and economy. Up to 42.8mpg is promised, which is an impressive figure for a 182bhp petrol car. Add 4MATIC four-wheel drive, though, and economy drops to 40.4mpg. CO2 emissions of 138g/km for the rear-wheel drive version mean a BiK rate of 31%. A 1.6-litre C180 model kicks off the range but the C200 offers the same economy and extra performance, so it’s worth the extra if you can afford it.

The C300 is a 2.0-litre petrol, which returns 40.4mpg and emits 136g/km of CO2 for the same BiK rating, while the performance models - the C43 and C63 S - return rather lower figures of 29.4mpg and 25.5mpg respectively. As you’d expect, both of these cars occupy the top BiK band.

It's possible to buy a C-Class Coupe for less than £40,000, and such a car will cost £145 per year to tax. If you tick a few option boxes or upgrade to another engine or trim level, you’ll break that £40k barrier, and the annual road-fund license leaps by £320 – you'll need to pay £465 in the second to sixth year of ownership, but after that, the lower £145 fee will apply.

Insurance groups

Insuring a Mercedes is never particularly cheap, especially if you buy a coupe, which is inherently more sporty and desirable than its saloon counterpart. Naturally, the entry-level diesel and petrol models will be the cheapest to insure (depending on trim level and engine, they fall into groups 32-42), while the C43 is in group 45 and the C63 S is in the top group 50.


When it comes to maintaining your C-Class Coupe, Mercedes offers various annual servicing options, including two, three and four-year plans that are transferable to subsequent owners, which should help boost the car's residual value when you come to sell it.


Mercedes offers a fairly standard guarantee with its cars: a three-year/unlimited-mileage warranty. This is slightly more generous than the three-year/60,000-mile warranty supplied with the Lexus RC.

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