The new units take the form of the S 300 BlueTEC Hybrid L AMG Line, S 600 L AMG Line and S 65 AMG L and will begin production from April 2014.

The S 300 BlueTEC Hybrid L AMG Line is the second hybrid engine for the S-Class line-up (alongside the S 400 Hybrid L), and is from the same engine family as the E 300 BlueTEC Hybrid, with a 2.2 litre, four-cylinder diesel engine married up to a 26bhp electric motor.

The unit offers a combined fuel consumption of 61.4mpg and CO2 from 120g/km and is priced from £72,260 OTR.

Meanwhile the line-up also gains two V2 models. The S 600 L AMG Line, priced from £139,960 OTR, offers a 13bhp increase over the previous S 600 model to 523, with 612lb.ft of torque and a 0 to 62mph time of 4.6 seconds. Emissions are reduced by 21% to 259g/km, with a 27% improvement in combined fuel consumption to 25.5mpg.

The S 65 AMG L, which is priced from £179,960 OTR, offers 621bhp and 738lb.ft, giving a 0 to 62 mph of 4.3 seconds – a 0.1 second improvement over the previous S 65 AMG L. In addition, there is a 16% decrease in CO2 emissions to 279 g/km and a 20% improvement in combined fuel consumption to 23.7mpg.

Mercedes adds that the two new V12s are meant to ‘represent the ultimate levels of standard equipment’. Key features include: the Executive Rear Package and Rear Seat Reclining Package; Rear Seat Comfort Package including Rear Seat Entertainment; Front Seat Comfort Package; Exclusive nappa Leather Package; Burmester 3D High End Surround Sound system; and Keyless-Go Package, which includes remote boot closing and hands-free access.