Mercedes planning BMW X6 rival. Cheshire holds its breath

Mercedes is known for its ability to pointlessly fill niches. Without the firm's constant hunt for more and more micro-markets we'd be without such greats as the R-Class (and its AMG version), the B-Class (which is like a people carrier, but expensive) and the GL-Class (an SUV the size of Columbia).

However, the German firm missed one niche altogether – the Coupé-SUV, which BMW 'owns' with the X6. For now...