Removal and installation the tweeter (in the front door)
1. Remove the front door trim.
2. Unlock the fasteners (1) in the direction indicated by the arrow and remove the high-frequency speaker (2) from the trim (3) of the front door.
3. Installation should be carried out in the reverse order of removal, taking into account the above notes.
[Information taken from this resource: www.bmwman.ru]