Mercedes-Benz has added the E 350 engine to the E-Class Coupé and Cabriolet, with prices starting from £44,750 for the Coupé and £49,246 for the Cabriolet.

The E 350 features a 2.0-litre petrol engine with EQ Boost, which has an output of 299hp and 400Nm of torque. EQ Boost uses a 48-volt onboard network with a belt-driven starter/alternator – the system adds 14hp to the car’s overall output. It can travel from 0 to 62mph in 5.9 seconds – 6.1 seconds for the Cabriolet – and has an electronically-limited top speed of 155mph. The Coupé delivers up to 40.9 combined mpg and emits 158g/km of CO₂ (depending on wheel size), while the Cabriolet can achieve 39.8 combined mpg and emits 163g/km of CO₂.

Both the Coupé and Cabriolet come as standard with a 9G-Tronic Plus 9-speed automatic transmission.

Both models are packed with a high specification of kit as standard including blind spot assist, 12.3-inch widescreen cockpit display, two centre console and two rear USB ports, touchpad with controller, illuminated door sills, 19-inch five-twin-spoke alloy wheels, Seat Comfort package including electrically adjustable front seats, privacy glass (Coupé only), ambient lighting with a choice of 64 colours, keyless-go starting function, heated front seats, split-folding rear seats, black open-pore ash wood trim with black Artico Dinamica leather upholstery.

There are a number of option packages available. The Premium package is available for £2,395 and includes COMAND Online, wireless charging, Parking package including 360-degree camera, memory package and Multibeam LED Intelligent Light System.

The £3,450 (£4,395 for the Coupé) Premium Plus package adds a Burmester surround sound system, keyless-go package including hands-free access, keyless entry and start and automatic powered boot closing and a panoramic sunroof (Coupé only).

The Night package can be added for £645 and includes 20-inch multi-spoke alloy wheels, diamond radiator grille and a single louvre in high-gloss back, front apron in high-gloss black and rear bumper in high-gloss black with chrome trim.

The Comfort package – only available in conjunction with the Premium package – costs £3,295 and includes Air Balance, Energizing comfort control, Air Body Control and Nappa leather upholstery.

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 Distronic and Active Speed Limit Assist, Evasive Steering Assist and Pre-Safe Plus.