You likely have the standard suspension, but presence of the sport steering wheel and such isn't a reliable means to check. You need the build option list of your car to be sure.

Either you have this perhaps from the window sticker or sales contract or my asking your local dealer (most will do this for free when you provide that it's your car) OR go on line to BMW Baureihenarchiv · BMW Vehicle Identification Number Decoder · bmwarchiv.de to get the build list from BMW itself.