There is one profoundly funny thing about the new Mercedes-Benz CLK DTM AMG and we'll have to get it out of the way now before we can move onto the more serious stuff. I'll leave aside the merely chucklesome fact that its name suggests some highly decorated combat career and bring you straight to its top speed. This Mercedes will do 199mph. You may now be wondering why you're not even giggling: as such figures go it's pretty impressive but funny it ain't. Not, at least, until you discover that this is the speed to which it is electronically restricted...