We look at 4x4s to see which really can go off-road, but Jeremy takes it too literally and decides to drive a Land Rover Discovery up a Scottish mountain. Also, the Dodge Viper SRT-10 slithers around the Top Gear test track.

Richard drives the Morgan Aero 8 GTN, and invents a new sport: racing people carriers. James celebrates 50 years of the Mercedes SL Gullwing. Jeremy tests the diesel engine in the Jaguar S-Type by driving it as fast as he can around Germany's notorious Nürburgring.