The E300 Bluetec Hybrid achieves a combined fuel economy figure of 65.7mpg and emits 109g/km of CO2, according to the manufacturer.
Power for the most fuel-efficient E-class is courtesy of Mercedes' 201bhp 2.2-litre diesel engine, which is backed up by a 27bhp electric motor. The E300’s electric motor is mounted in the model’s seven-speed automatic gearbox, a unit that features a wet clutch system that disengages engine drive to enable electric drive only for short periods.
Despite the new model’s green credentials, the E300 Hybrid saloon will sprint to 62mph from rest in 7.5sec and will go on to a top speed of 150mph. The estate variant covers the same sprint in 7.8sec and will hit 144mph flat out. CO2 emissions for the estate are slightly higher at 116g/km.
Standard equipment on the new model includes 17-inch alloys (16-inch alloys are also a no-charge option to hit the model’s claimed maximum economy figure), plus leather seats, sat-nav and LED daytime running lights.
Prices for the E300 Bluetec Hybrid saloon start from £39,645, while the estate commands a £1790 premium at £41,435. UK sales of the new car start from November.