Sounds like the you're leaving the lighs on
and the battery-save function is killing them.
--
pj

Hi,

When seated in the drivers seat, check the dial/switch near your left
knee.

As Jim Smith mentions above, the rotary switch for controlling the
brightness of the dash lights also controls the lights on the
mirror... by pushing the switch in once for turning them BOTH on, and
pushing again to turn them off. This switch has precedence over the
buttons below the mirror; if the switch is accidentally pushed when
you enter or leave the car, you can try to control the lights all day
with the push buttons with no affect until the "save battery" feature
turns them off. And if the lights have been turned on with the push
buttons on the mirror, you won't be able to turn them off with a push
of the rotary switch until they are also turned off with the buttons
on the mirror.