At Top Gear Australia, the guys love a challenge. As such, they enter the Scrap Metal Challenge. The guys and their motoring masterpieces assemble at Oran Park for a race showdown. There can only be one winner. Steve test drives the new Mercedes CLK 63 AMG Black Series coupe and Warren gives us his impression of the BMW X6 Coupé 4WD. Julia Zemiro is the "Celebrity in a Bog Standard Car".