Back to Black

As the Black rolls off the ramps and into London's early evening gloom, the countdown begins. One single night. For all our begging and cajoling, that's all the time Mercedes has given us in the Black. Oh, and if it leaves London, moustachioed German heavies will turn up at Top Gear HQ and murder us in new and interesting ways. The most powerful AMG Merc ever, the SL65 Black, the car christened ‘Der Beast' by its Frankenstein-esque creators, and we're limited to one night in the most congested, cramped city in Europe. 

Just to make things interesting, the previous day has seen the heaviest snowfalls in Britain in 20 years. Snow that's freezing rapidly to sheet ice on the roads, making 670bhp and rear-wheel drive look a tad suicidal. Still, one night. The clock is ticking. Let's head underground.