Her er en engelsk vejledning som jeg har gemt en gang - det er til en 406. Ved ikke om det er det samme eller om du læser engelsk:)
The mirror glass has a wire retainer this cilps onto the motor on the mirror body.
this wire clip runs in a circular manner, it is about 1.5 to 2 inch diameter. this needs to be 'unclipped' once you have done that the mirrorglass will come away from the motor without any issue or risk of breakage.
To unclip this glass you will need a tool like a flat ended screwdriver that had a 90 degree bend it in, this is what will be required in order to unclip this(ese) clip(s)
The clip is situated along the bottom of the glass, about halfway along, it is sprung loaded, the trick is to get hold of the clip and push it away from you, not easy when you can see it