First time posting.  Fiance has a 98 Z3 and the power seat will go back and forward but not up and down anymore.  Is there any chance this could be a fuse or relay?  Power top stopped working also, but that was last summer: told her to use the manual mode!!!  I drive a 02 530I with M suspension and the rest of the bells and whistles.  Think they are both great cars but a bear to work on.  Thanks