Clarkson: head to head in the C63 AMG Black and M3 GTS

At this point, I should declare an interest. I currently own a CLK Black, and it is a tremendous thing. Loud to both the eye and the ear, it's serious and completely stupid in equal measure. I love that. But, behind the tremendousness, there are some properly annoying flaws. London and back is not possible on one tank of fuel. The sound system is woeful. Full throttle is only a theoretical possibility, and the dismal ride is never worth the benefits you might experience on a track. In fact, there are so many flaws that, in recent months, I've been thinking, quite seriously, about changing it for an M3.

I therefore have a foot in both these camps. I'm as interested in the outcome of this test as I hope you are.