Ad closing in a few seconds...
View all Mercedes-Benz C-Class reviews
Parkers overall rating: 4.1 out of 5 4.1
  • Range of frugal new engines impress
  • Economy figures are appealing
  • Insurance and servicing could be costly

For the highest fuel economy figures, the diesel C-Classes will be of most interest, with some impressive claimed mpg numbers for all. The most fuel-efficient is the C 200 d, returning up to a claimed average of 65.7mpg.

If you want the extra power offered by the C 220 d, fuel economy doesn’t take too much of hit, with a claimed average of 61.4mpg for the rear-wheel drive model. Adding 4Matic all-wheel drive sees this fall to 57.7mpg.

The petrol models can’t match even the least frugal diesel’s claimed economy figures. The most efficient petrol is the C 200, which returns up to 46.3mpg. The 4Matic version of this motor achieves up to 43.5mpg according to Mercedes-Benz.

The more powerful C 300 claims 42.2mpg, while the Mercedes-AMG C 43 is the worst performer (unsurprisingly), returning just 30.4mpg on the combined cycle.

It shouldn’t be too pricey to run most C-Class models then, but servicing and maintenance is likely to be quite costly unless you opt for a service plan, while insurance prices could also be a little higher than you might expect, especially compared with something like a Volkswagen Passat.

Green credentials

When it comes to CO2 emissions, the C-Class range varies greatly across the board. Unsurprisingly, it’s the diesels with the lowest emissions figures, but the amount emitted by each model varies depending on the size of the wheels.

The C 200 d offers the most attractive CO2 emissions figure of between 108- and 118g/km, with the C 220 d claims between 117- and 126g/km of CO2. Add 4Matic to this model and you can expect between 131- and 144g/km.

Mercedes-Benz C-Class emissions

The C 200 is the cleanest of the petrol line-up, with emissions between 136- and 144g/km, with the 4Matic version returning 148-156g/km.

The C 300 emits between 148- and 158g/km, while the Mercedes-AMG C 43 emits 213g/km.


  • C-Class looks and feels solidly put together
  • Lots of recalls issued for the car, though
  • If buying used, any problems will have been sorted

The C-Class looks and feels a solidly built car, but that doesn’t mean it’s immune to problems.

So far in its life cycle, it’s been the subject of a number of official recalls, involving:

  • 2 x seat belt
  • 1 x axle mounting breaking
  • 1 x faulty wiring in steering assembly
  • 1 x power steering
  • 1 x flammable vapour may ignite
  • 3 x fuel leak
  • 1 x airbag

Estimated fuel cost per year

Fuel type Pence per litre Estimated cost per year *
Unleaded 128p £1,098 - £2,078 *
Diesel 131p £827 - £1,124 *

* The estimated fuel cost figure is based on an annual mileage of 10,000 miles and is a guide to how much this model will cost in fuel each year. It's calculated using the model's average MPG (calculated from both town centre and motorway driving) and the average fuel price from around the country. Actual fuel costs will vary based on driving style and road conditions.

Highest and lowest CO2 emissions

Engine CO2 emissions Road tax (12 months)
Diesel/PlugIn Elec Hybrid 38 g/km (Min) £455
4.0 Petrol 227 g/km (Max) £465

Ongoing running costs

Road tax (12 months) £0 - £465
See tax rates for all versions
Insurance group 23 - 49
How much is it to insure?

Vehicle excise duty (VED) varies according to the CO2 emissions and the fuel type of the vehicle. For cars registered before 01 March 2001 it is based on engine size. For cars registered on or after 01 March 2001 the VED or road tax is based on the car's CO2 emissions.