Until BMW launches a replacement for the 6 Series Gran Coupé, the only real rival to the CLS is the Audi A7, which currently starts at £48,045, ahead of its replacement by a second generation early next year.
Price wise, the CLS range so far tops out with the 400d at £60,410, but the most powerful unit at launch is the 3.0-litre petrol engine in the 450 4Matic, with a 48V electric system and EQ Boost integrated starter motor providing mild hybrid properties. It has a claimed 0-62mph time of 4.8sec and limited 155mph top speed. It delivers a nominal 362bhp and 369lb ft, with an additional 22bhp and 184lb ft available for short periods when the integrated starter motor is triggered.
The range uses petrol and diesel in-line six-cylinder engines. All are turbocharged and mated to Mercedes’ in-house nine-speed 9G-Tronic automatic gearbox and with 4Matic four-wheel-drive system as standard. The 350d and 400d share the new 2.9-litre diesel engine in two states of tune.
For the 350d, 400d and 450, Mercedes claims respective fuel economy figures of 48.7mpg, 47.9mpg and 36.2mpg, with CO2 emissions of 156g/km, 156g/km and 184g/km respectively. The CLS is only available in AMG Line trim – this means 19in alloys, a parking pack with reversing camera, ambient lighting and Mercedes' Agility Control adaptive dampers all come as standard.
Shortly after launch, Mercedes plans to introduce the 350. It runs a new turbocharged 2.0-litre petrol engine also featuring electronic boosting qualities. Also planned is the 300d, which employs Mercedes’ widely used turbocharged 2.0-litre four-cylinder diesel engine tuned to deliver 242bhp.