- 1 of only 2 SLS GT Roadsters Built for the UK - One of the Rarest Convertibles in the World - Full Mercedes-Benz Service History - Truly Stunning Example Various features distinguish the SLS AMG GT Roadster from the normal SLS AMG Roadster. Among the changes include a more efficient and powerful naturally aspirated 6.2-Litre V8 producing an added 18 bhp to total 581 bhp. Accompanying the boost in power is a reworked seven-speed gearbox that uses new software for improved shift times. Most of all, it is the changes brought to the suspension that help define the hardened character of the SLS GT Roadster. The GT model is stiffer as it features increased springs and damping rates. Further exterior changes include the darkened headlights and taillights, high gloss finish grille, exterior mirror housings and bonnet fins, red brake calipers and GT badging. Step inside and you are greeted with lightly restyled instruments, diamond quilted leather interior trim and alcantara. We believe the SLS to be a modern day classic as it will be one of the most remembered and desirable Mercedes in years to come. It is a great investment opportunity and it's no surprise that we are seeing many collectors purchasing the best examples with an eye on it's future value.