Hi, I am just looking to buy a Z3 3.0 but need to fit wheelchair in boot, have noticed that some Z3 s have a box hanging from left hand side which will restrict height. Can anyone tell me what this is and if can remove ie if CD player, it has a trim around it and I have noticed that some Z3 do not have this but do have electric roofs so don't think it is the roof motor. Have noticed some have CD player underneath this trimmed box. Any help would be very much appreciated.