it is a first for BMW, and will set it apart from Audi and Mercedes, which have promised that their next A4 and CLK cabriolets will stick to cloth.So what is all the fuss about?Well, peeling back the roof of a cloth-topped convertible with a knife is a far easier job than getting into a tin top, so it is a lot more secure.it is also certain to be more refined with the roof up, which is a great plus po