Opel Automobile Owner's Manual page 27

Folding
For pedestrian safety, the exterior
mirrors will swing out of their normal
mounting position if they are struck
with sufficient force. Reposition the
mirror by applying slight pressure to
the mirror housing.
Corsa OPC: For pedestrians safety,
the exterior mirrors of the Corsa OPC
are released from the holder if they
are bumped. Fit mirror housing to
holder with latching lugs and engage
by striking gently.
Keys, doors and windows
Manual
The exterior mirrors can be folded in
by pressing gently on the outer edge
of the housing.
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