Stupid I damaged my passenger side external mirror, parts of the casing broke out. I glued them back on (leaving for holidays the next day), but this does not look acceptable. I have bought a used complete mirror assembly (which includes the window triangle, the arm, the actual casing and all components therein) in the correct colour and now wonder, whether it is possible to replace the mirror casing only, leaving the arm as is. i.e. without removing it from the door (which would seem not exactly a swift job). I unscrewed the 3 torx screws in the bottom of the arm. The casing comes off the arm, but the electrical wires prevent removal. I have not disassembled anything at the door, but can see from the replacement parts that the connector in the door will not fit through the arm cavity. I can look behind the mirror glas and see connectors (heating and motors), but there is no chance to get hold to them. Is there any chance to remove the mirror from the casing/drive block therein without destroying any components? If so, it would be very straight forward to replace the casing, since then the wires could be removed from the old casing and fitted into the new one, followed by assembly of the casing to the arm and reassembly of the wires and mirror glas.