ive just gone out to the car sat in it in locked the door (and sat very still for 10 min as not to set the alarm off) I could hear it running behind client control panel but also could hear the satnav computer in the boot making a noise. should the nav unit be powered off?

just wondering if again this is now to do with the navcoder as was spliced in the nav and only did this today and had the issue tonight

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2005 E53 X5 post facelift