Mercedes has updated its C-Class with all 2011 models receiving the marque’s BlueEFFICIENCY technologies and systems.

Since its release in early 2007 the C-Class has become one of the most important cars in the German manufacturer’s line-up and Mercedes is looking to continue that success by improving its efficiency and economy.

All 2011 models have received stop/start technology resulting in an increased fuel economy of 31 per cent across the range.

At the forefront of the improved models are those fitted with the C 220 CDI diesel engine and mated with a manual transmission. This combination results in CO2 emissions of 117g/km and a combined fuel economy of 64.2mpg.

There are two alternative diesels in the range in the form of the C 200 and C 250 powertrains which both emit 125g/km of CO2 and register 58.9 and 55.4mpg respectively, on a combined cycle.

Petrol variants come in the form of the C180, C250 and the flagship C 350 that again benefit from Mercedes BlueEFFICIENCY technologies.

The C 350 V6 is the most powerful in the C-Class range with 306bhp and the ability to clear 0-62mph in six seconds as well as a top speed of 155mph.

Less obvious on the 2011 C-Class are the styling changes that Mercedes has rung.

The new C-Class has received reprofiled bumpers, a redesigned bonnet and new front and rear lamps as well as a range of new alloy wheels.

Despite the subtle nature of the exterior upgrades, Mercedes says the drag coefficient of the car has been improved- again aiding economy and efficiency.

For the first time, safety technologies like Distronic Plus cruise control and Pre-Safe brakes have been included on the C-Class when before they were only an optional extra on the larger and more expensive E-Class model.

The 2011 Mercedes C-Class will go on sale four years after its last release in March with prices starting from £25,000. holds a range of Mercedes-Benz cars including the popular C-Class estate and saloon. The car-buying website allows visitors to choose between outright purchase, leasing and finance deals. holds a number of Mercedes-Benz C-Class business lease options.