What is it?
Mercedes-Benz’s successor to the six-year-old SL 55 AMG, the SL 63 AMG.
The new two seater, set to reach the UK next month, forms part of a five-strong facelifted SL line-up that also includes the 231bhp 3.0-litre V6 SL 280, 316bhp 3.5-litre V6 SL 350, 388bhp 5.5-litre V8 SL 500 and storming 612bhp twin-turbocharged 6.0-litre V12 SL 65 AMG.
As the name of AMG’s latest model suggests, the up-market roadster gets a new naturally-aspirated 6.2-litre V8 that replaces the outgoing model’s supercharged 5.4-litre V8.
Despite a lack of forced injection, the new powerplant’s larger capacity sees it trump its predecessor to the tune of 15bhp, putting out 525bhp at 6800rpm. It can’t match the old engine’s huge torque rating, though; the SL 63 AMG’s 450lb ft is 66lb ft down on the SL 55 AMG, and is developed some 2550rpm further up the rev range at a high 5200rpm, meaning it has to be worked fairly hard before you see its best.
All this muscle makes its way back to the rear wheels via a new seven-speed paddle shift gearbox. Designed to handle torque loads of up to 516lb ft, the new gearbox offers the choice between four modes; comfort, sport, sport plus and manual – the latter claimed to boast shift times of just 100 milliseconds.
Inside, there’s a new three spoke steering wheel with remote shift paddles, lightly altered instrument graphics, redesigned sport seats with optional Airscarf system as well as a new navigation and entertainment system. The centre console is reworked to accommodate the revised shift lever and its associated switchgear.
There’s also a striking new front end design that, to these eyes at least, provides the SL 63 AMG with an instantly more aggressive appearance than the SL 55 AMG.
What’s it like?
Vastly more fluent in its actions than the SL 55 AMG ever was. While the basic four-link (front) and multi-link (rear) suspension remains unchanged in its basic design, AMG have provided the SL 63 with new spring and damper rates as well as altered bushes more rigid front axle bearings.
The steering ratio remains the same as before at 14.5:1, AMG deciding to eschew the variable DirectSteer system that has gone into other facelifted SL models in the interests of a traditional linearity within the helm. While lacking the whip crack action of some open top rivals, the speed sensitive arrangement possesses a reassuringly progressive feel that boosts driver confidence.
The reworked suspension provides more than adequate levels of compliance, but also remains wonderfully controlled on all sorts of surfaces, leading to phenomenal front end grip. Indeed, you can throw this car into corners at seemingly insane speeds and it will retain your chosen line with steadfast assurance. Ride quality, meanwhile, remains exemplary. Yes, it’s firm, but it is never harsh.
Another development is the appearance of AMG’s three stage ESP system – as first unveiled on the C 63 AMG last year. It provides the driver a choice between a standard and sport setting – the latter serving up greater slip angles before the onset of individual braking of the wheels. Furthermore, you can now also turn the system off completely – not something I would recommend on public roads but just the thing for track days.