Electrical Problem
 

Need advice, sometimes when I get in my 2008 E70 the power mirrors are out of position, if I turn my lights off they are on and the clock has no time, I reset the clock and the next morning it is out of time again, also when I don't use my E70 for a couple of day it has a slow start. Any suggestions. Thanks

you need a new battery

Just buy a new battery. Not at the dealer. Do a search on how to install.

Definitely the battery failing. I just had mine replaced on my X6 following multiple symptoms of electronics erratic behavior and intermittent display of the battery discharge message.