Its for the coupe only. The Sedan is different .... as that has DOORS in the back ;-)
Heres a link to it on accessories.
http://accessories.bmwusa.com/ItemVi...&productId=781
The pic is a bit misleading as it doesnt loop over the front seats in the coupe. You have a separate backcover for the front seat.
Its a really nicely designed item. I've just ordered a new one for my X5 !!