Skip advert
Advertisement

Mercedes C180K BlueEFFICIENCY

New engine and body tweaks help the c-class clean up its act

Overall Auto Express rating

4.0

How we review cars
Find your Mercedes C-Class
Compare deals from trusted partners on this car and previous models.
Or are you looking to sell your car?
Value my car
Fast, no-nonsense car selling
Value my car

Even though it has arrived relatively late at the eco party, Mercedes’ new BlueEfficiency system is superb. This C180K is a great example of a refined and fuel-efficient saloon that doesn’t demand compromises of the driver. Mercedes says petrol power could mount a resurgence in the executive sector – and this car is so efficient, it could be right.

Advertisement - Article continues below

There’s no doubt BMW stole a lead over Mercedes with its economical EfficientDynamics models. Now, though, the three- pointed star is set to respond with its own line of fuel-sipping BlueEFFICIENCY machines.

First to go on sale is the entry-level C180K. Instead of employing the stop-start system favoured by BMW, Mercedes has chosen to downsize. The C-Class’s 1.8-litre engine has been replaced by a 1.6-litre, still boosted by a supercharger. It produces 156bhp and 230Nm of torque from 3,000rpm.

There is plenty of pulling power and drivers can move quickly through the gears – which is key to the new car’s efficiency. Mercedes has fitted a dashboard indicator telling you when to change up. And even when the light advises you to select fifth at 30mph, the car copes well.

In addition, lower suspension, energy-saving tyres and more aerodynamic door mirrors help make the C-Class more slippery.

The manufacturer claims the newcomer returns an average of 44.8mpg and emits 149g/km of CO2. This isn’t quite as good as a 3-Series, but represents an improvement of nearly 10 per cent on the standard C-Class.

Adding to the appeal is the fact the BlueEFFICIENCY costs no more than the 1.8, plus is £50 a year cheaper to tax and has better predicted residuals.

Rival: BMW 3-Series
with the EfficientDynamics system, the 3-Series adds strong fuel economy and low emissions to its list of talents. It’s already in the top 10 of the UK sales charts with its blend of agility and quality.

Skip advert
Advertisement

New & used car deals

Mercedes C Class

Mercedes C Class

RRP £32,830Used from £13,990
Audi A4

Audi A4

RRP £34,385Used from £13,295
BMW 5 Series

BMW 5 Series

RRP £52,195Avg. savings £6,739 off RRP*Used from £33,989
Audi A6

Audi A6

RRP £39,640Avg. savings £7,364 off RRP*Used from £16,683
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Leapmotor B05 family hatch on route to the UK with sub-£30k price and 400-mile range
Leapmotor badge

Leapmotor B05 family hatch on route to the UK with sub-£30k price and 400-mile range

The Stellantis-backed brand will launch a Volkswagen ID.3-rivalling small car with almost 20 per cent more range
News
23 Apr 2025
New Renault Clio prepares for launch: And it's not an EV
Renault Clio Mk6 (camouflaged) - front 3/4 tracking

New Renault Clio prepares for launch: And it's not an EV

The Clio isn’t going anywhere despite the reemergence of the Renault 5
News
22 Apr 2025
Chinese cars can’t match their European rivals when it comes to engineering
Opinion - Shanghai Auto Show

Chinese cars can’t match their European rivals when it comes to engineering

Deputy editor Richard Ingram was surprised by the sheer variety of Chinese cars when visiting the Shanghai Auto Show
Opinion
24 Apr 2025