Thank you gents for clarifying the AC thing.

One thing though, I noticed that if I shut off the car and turn it on again, AC does NOT come on?

Anyway, I didnt feel like unloading the back and hooking up a DMM to the battery just yet. I did remove every fuse related to the radio and telephone system in the trunk first, and checking voltage on the OBC.

At shutoff I usually have 12.4-12.6v. After 2 days I was at 12.1

Still not good enough I think, really need to find the time to hook up the DMM.

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04 X5 3.0i auto
03 X5 4.6is