I recommend you purchase one from BMW for your car there is a lot of stuff out there that might give you problems. It will cost you a bit more, however, it is a cover you can rely on. I put 2 pictures on my web site. One I enlarged so you can see the special pattern that allows the car surface to breathe (remember everything does breathe) here is the linkcj_eds wrote:Does anyone have a car cover they can recommend for the coupe?
http://web.me.com/solgain/Dieters_Trave ... age_4.html
one shows the cover on my M3 before I sold it. The cover has served me well for 10 years without any problems (some have been described in posts here) I used it on a 1987 535is restored, M3, Z4 2008 3.0is and now on my 2009 Sdrive Z4 3.5is
There are covers and then there are covers, so get the right stuff and you will not be sorry. Good luck in finding the right cover.