The journalists from the British magazine EVO do a test drive with the new Mercedes SLS Roadster. What's interesting to notice is that even though it looks pretty cold outside, the Henry Catchpole is driving with the top down. This means that Mercedes’ latest developments, which are meant to keep passengers warm in open-top vehicles (the AIRSCARF system), are doing their job just as advertised. The Mercedes SLS Roadster is powered by AMG's 6.3 liter engine, which in this application outputs 571 hp.