Let’s look at the numbers first. In our testing runs the S63 AMG took just 4.42 seconds to reach 100kph while 200kph was dispatched in an equally impressive 13.89 seconds. These numbers are staggering, especially when you consider the 5.5 litre 577bhp engine has to haul around 2070 kg of weight. Top speed, usual with German cars is limited to 250kph, and even when the limiter kicks in, you can feel a marked reduction in acceleration. Such is the pulling power of this fabulous engine.
For the most part, the S63 AMG’s V8 remains almost completely silent, whether at idle or low to mid-range revs, and unless you have an awful amount of space available, you will rarely get the engine spinning much beyond 4000rpm.
The turbochargers are very effective too and a peak torque of 900Nm is available from 2250rpm onwards and doesn’t let up until 3750rpm. This means power delivery is extremely linear and the response is immediate for a turbocharged engine. With the gearbox in comfort mode, the shifts are a bit laid-back with no jerks and is perfectly suited for normal driving. In sport mode the gearshifts on the dual clutch transmission quicken for more spirited driving. Although the gearbox is quick enough it still doesn’t feel as potent as the other DSGs we have experienced on rival cars. You can also drive the S63 in manual mode, where the gearbox sticks on to a gear, right to the engine’s redline till you pull the paddle to upshift.
With the S-Class, you expect the emphasis to be more on the ride than handling, but being an AMG the importance should be the other way round. Mercedes has tried to do just that, but they have just fallen short of nailing it. The main problem is that the S63 AMG doesn’t quite know what it wants to be – an ultra-luxurious cruiser or a big sporty coupe – and in the event it ends up being neither. The S63 gets Merc’s famed Magic body control, which prepares the suspension by scanning the road ahead using cameras. On most surfaces, the ride comfort is good, but it feels unresolved over large potholed city roads. Things do get better as you go faster but the S63 always feels heavy, the suspension feels a bit clunky and you are forced to slow down over road imperfections.
The S63 comes with loads of tech to make it carve corners in a way that defies its weight and size. To a certain degree, it succeeds too. In comfort mode, there is more body roll but as soon as you put it in sport, the dampers tighten up and the body movements are well controlled. But it is in the Curve control mode where the car leans into corners where it feels at its best. In this mode, body control is quite exceptional for a two-tonne-plus car. The car leaning into corners also mean the passengers feel less of the G forces and this makes it quite comfy during spirited driving. What is particularly impressive is that the S63 has loads of front end grip which gives you the confidence to push the car harder and the handling balance is quite impressive. But on the downside the steering peculiarly feels vague and lifeless, even though it is ultimately accurate to use.