The ad says "Primarily for indoor use", so I guess a few hours outside in the shade won't hurt it... Personally, I'm not a big fan of storing cars with covers outdoors so regardless of what the ad says I wouldn't recommend it.
Alberto, I have an E3 and it certainly it won't fit that. By and large the only difference between your car and what's listed on the box is fuel injection so unless you have trumpets sticking out of the hood I have to assume it would fit your CS.