How long before battery goes dead?
 

My X5 4.8 has been sitting unused for 2 weeks now and was wondering how long before the battery goes dead and if any other issues could arise.

Depends entirely on its state of charge when you parked it, and to some degree,
the ambient temp it sat in. I've parked my X for 2 weeks, many times, with no sweat
starting. I used to park my ol'POS co. car in the EWR airport for 2 weeks+ at a time
for years...they Always started, but then they weren't BeamER electronics, either,lol.
GL,md

I have left my X5 for 3 weeks and had no problem. Although the manual says to use the BMW charger if parked for more than 2 weeks. :dunno:

On my 2003 X5,I am currently charging my oem 90Amps battery after leaving
the car in my garage for 2.5 weeks.I am charging it at a low rate of 5 Amps per hour for a total of 18 hours!!!There are 3 colour codes on the battery to determine its state,GREEN=Fully charged,BLACK=Discharged,YELLOW=Replace it....When charging it ,it only starts to show a faint green after some 14 hours!!!!!Hope this info is helpful.