MERCEDES-Benz has added the E 450 4MATIC powertrain to the E-Class coupe and cabriolet line-ups, replacing the E 400 4MATIC and is also bolstering its CLS line up.

Prices start at £50,900 for the coupe and £55,395 for the cabriolet while the E 400 d 4MATIC All-Terrain is priced from £64,445. The CLS 350 starts at £52,625.

In the coupe and cabriolets, the new E 450 4MATIC uses an inline six-cylinder petrol engine - as seen in the CLS 450 4MATIC - with Mercedes-Benz's EQ Boost technology.

It has an output of 367hp and 500 Nm of torque, with an additional 22hp and 250 Nm available thanks to EQ Boost. The EQ Boost system uses a 48 volt inline starter-generator, which enhances performance while also reducing fuel consumption.

The E 450 4MATIC can deliver up to 32.1 mpg on the combined cycle (31.7 mpg for the cabriolet) and emits 202g/km of CO. The coupe is timed at 5.6 seconds 0 to 62 mph in 5.6 seconds, while the cabriolet takes 5.8 seconds. Both models have an electronically limited top speed of 155 mph.

Replacing the E 350 d, the E 400 d 4MATIC features a 3.0-litre inline diesel engine - codenamed OM656 - which generates 340 hp and 700 Nm. The coupe can sprint from 0 to 62 mph in 5.1 seconds, while the cabriolet takes 5.2 seconds. Both have a top speed of 155 mph.

The CLS 350 features an all-new four-cylinder petrol engine capable of producing 299hp and 400 Nm and emits 162g/km which equates to 39.8 mpg. It has an electronically limited top speed of 155 mph and can travel from 0 to 62 mph in 6.0 seconds.

The E 350 d 4MATIC All-Terrain has now been replaced by the E 400 d 4MATIC All-Terrain which also features the 3.0-litre inline six-cylinder engine, generating 340hp and 700 Nm of torque.

It can reach 62 mph from standstill in 5.4 seconds, and has a top speed of 155 mph.

The E 400 d 4MATIC All-Terrain comes with air suspension, the Mercedes Multibeam LED Intelligent Light System, a panoramic sunroof and a tow bar as standard as well as a surround-view camera and wireless phone charging.