You need to apply a lot of force in a short amount of time. That means hammering! Use a 3" diameter tree branch for a hammer. Wrap the mirror's point of impact with rubber so as not to mar it.

__________________
85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked