Mercedes has released details of its forthcoming diesel plug-in hybrid E-Class ahead of the first cars arriving next spring.

On sale now, it is priced from £47,700 in saloon form and £49,700 in estate form.

Badged E 300 de, it is powered by a 194hp 2.0-litre diesel engine that’s mated to a 122hp electric motor. According to Mercedes, it can achieve 166.2mpg on the combined cycle and emits 41g/km of CO2, rising to 44g/km of CO2 in the estate.

Electric-only range is rated at 34/32 miles depending on the variant which can be charged from 10 to 100% in under two hours using a 7.4Kw charging point.

Under the new Plug-in Car Grant regime, which came into force last month, the Mercedes PHEV is not eligible for any Government support.

E-class Diesel PHEV

As standard, the model features blind spot assist, four USB ports, a touchpad with controller, spilt-folding rear seats, front and rear parking sensors, a seat Comfort package including electro-pneumatic four-way lumbar support, ambient lighting with a choice of 64 colours,  18-inch alloy wheels, keyless entry/exit and heated seats.

The AMG Line trim adds AMG exterior details including a different 18-inch alloy wheel design,   Artico Dinamica leather upholstery an  AMG steering wheel with touch control buttons and privacy glass while the Premium package is available for £2,395 and includes the firm’s infotainment system, wireless charging functionality, multibeam LED lights and a 360-degree camera.

The £4,395 Premium Plus package adds to this with a surround sound system, automatic powered boot closing and a panoramic sunroof.

Optional driver assistance systems include a Lane Tracking package (£595) that includes Active Lane Keeping Assist and the more comprehensive Driving Assistance package (£1,695) which adds Active Brake Assist; Active Distance Assist and Active Speed Limit Assist,  Active Lane-change Assist,  Evasive Steering Assist,  Pre-Safe Impulse Side and Pre-Safe Plus.