The mirrors on my vehicle change position without warning. Generally, while driving, the mirror motor kicks on changing the position. The moving mirror is the one on which the right/left switch is pointed. Both mirrors are affected, dependent on t4he position of the R/L switch. Should this be covered. I bought teh care certified in 2006. It has about 60K.
Mirrors change position. on 2004 BMW 325xi
It sounds like your mirror switch should be inspected for intermittently activating the mirrors. If you get out your certified/warranty book, it should very clearly tell you what is covered and for how long.