What is it?
The sixth installment in one of Mercedes’ best known and most desired model lineages: this is the new SL. It promises to scale new heights in terms of performance and efficiency, refinement and dynamism – but moreover, to offer an even more convincing blend of the intoxicating luxury and open air sporting thrill for which Mercedes’ grand convertible has become so widely revered.
The ‘R231’ is a massive undertaking for Mercedes – the firm’s first series-production model to be made almost exclusively from aluminium. The SL’s sophisticated body-in-white superstructure mixes die cast-, chill cast-, stamped- and extruded aluminium with a little magnesium and ultra-high strength steel. A lighter all-magnesium folding hard-top roof and mostly aluminium body panels contribute, in turn, to an overall kerbweight saving of up to 140kg, old car to new. More importantly, the new underbody has increased the car’s torsional stiffness (absolutely critical for delivering good dynamic performance in a convertible) by more than 20 per cent.
Two versions of the SL will be available in the UK this July, but the 4.7-litre twin-turbocharged V8 in the ‘500’ represents the biggest step forward in both performance and efficiency. With 429bhp and a huge 516lb ft of torque, it catapults the SL to 62mph in just 4.6sec – as fast as the last SL 63 AMG. It’s also capable of 31mpg on the combined cycle.
Suspension, like that of the last car, is all-independent, by multi-links at both ends. Steel springs with adaptive dampers are standard on both the V6 SL 350 and the SL 500; Mercedes’ air-sprung Active Body Control chassis is optional on both cars, but standard on the range-topping new SL 63 AMG, which arrives in the autumn.
And the cabin? That remains a strict two-seater. Need occasional back seats? Then you’re not SL people; feel free to shop elsewhere. It’s an arrogant and unusual stance, but one this opulent roadster nonchalantly backs up.
What’s it like?
On top of the all-new underbody, the SL’s basic concept and proportions are carried over. The car is long of bonnet, short of cabin, with the same slightly unwieldy looking bustle back-end, the dimensions of which are necessary to package the car’s metal roof when folded.