I'm guessing running the backup camera wires, extended fakra cable, and any other accessories... microphone, etc.

I'll be doing my Avin Avant 2 this week... the wife is off Wed til Mon so I can actually spend a bunch of time in the garage. I expect it to take at least 2 days @ 8 hours each.

I did upgrade the factory MKIV to v32 firmware today. Did it just because... never know if we decide to sell the factory nav stuff we can say it has been updated.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)