Mercedes has officially unveiled the E 200 Natural Gas Drive and the E 220 BlueTEC BlueEFFICIENCY Edition. They are eco-friendly models that will go on sale later this year.

Mercedes has introduced two new eco-friendly versions of the E-Class.

First up, the E 200 Natural Gas Drive (NGD) uses a new bi-fuel four-cylinder engine that produces 156 HP (115 kW) and 270 Nm (199 lb-ft) of torque. It enables the model to accelerate from 0-100 km/h in 10.4 seconds and hit a top speed of 220 km/h (137 mph).

When running on petrol, it consumes 6.3 L/100km (37.3 mpg US / 44.8 mpg UK) with CO2 emissions of 147 g/km. On natural gas, it averages 4.3 kg/100km with CO2 emissions of 116 g/km. More importantly, by using natural gas running costs are reduced by approximately 50 percent which could save you €1000 ($1337) a year if you drive 20,000 km (12,427 miles) annually.

The E 220 BlueTEC BlueEFFICIENCY Edition, on the other hand, has a 2.1-liter four-cylinder diesel engine that develops 170 HP (125 kW) and 400 Nm (295 lb-ft) of torque. This enables the car to run from 0-100 km/h in 8.4 seconds and top out at 227 km/h (141 mph).

To improve the car's efficiency, engineers added an engine start/stop system and an optimized 7G-TRONIC PLUS automatic transmission. The model also has an active shutter grille, a 15mm reduced ride height and low-rolling resistance tires. Thanks to these modifications, the car averages 4.4 L/100km (53.4 mpg US / 64.2 mpg UK) with CO2 emissions of 114 g/km

The E 220 BlueTEC BlueEFFICIENCY Edition will go on sale in September and German pricing starts at €47,272.75. Likewise, the E 200 NGD will be launched in December and cost €47,808.25 (both prices including VAT).

Mercedes E-Class Natural Gas Drive & BlueEFFICIENCY Edition announced