The trio of PHEVs, plus the one GLE PHEV that departs along with the rest of the range, will be replaced in the coming months by models utilising Mercedes' most advanced electrified powertrains, described by the company as “third-generation” technology and marketed under the EQ banner.
The new EQ system, first announced in the spring, comes exclusively with Mercedes’ nine-speed automatic gearbox, which is packaged together in same unit with the clutch and electric motor.
The electric drive from this tightly packed unit has been uprated so it now contributes 121bhp and 325lb ft of torque alongside each model’s respective combustion engine. Mercedes said the top speed in electric mode for its third-generation system is now 87mph, up from 81mph for the second-gen system.
Pure-electric range is also up to as much as 31 miles for each model — a gain of around 10 miles on the previous generation.
A Mercedes spokesman confirmed to Autocar that the first car to benefit from the new tech will be the S-Class. Already on sale in other markets, the updated luxury model will arrive in Britain in the autumn with a new S560e variant that uses a six-cylinder petrol engine with the electric drive unit, replacing the outgoing S500e.