Both my X5s have folding mirrors

Does anyone know what are the part numbers if you want to install this mirror folding option? I live in Singapore where parking lots and one way streets can be really tight. good to have this function.
Thanks guys.

my 2005 3.0d sport has retractable mirrors

I have an 06 4.4 with retractable mirrors (little button by drivers side windows button folds mirrors flat against car at about 20°) really great for parking lots.

Mine fold in then right back out -they wont stay- I would like them to for
my narrow garage.

Same here. Is that a defect/warranty issue?

The Auto dimming mirrors on the 3.0i include automatic dimming outside mirror, power folding mirrors and puddle lamps