I would leave the brake fluid change to a dealer or competent Indy. The brake fluid will trigger a message after so much time/mileage. I forget the number but ours triggered. I've done my own brake flushes on other BMWs but the dealer only charged like $120 so I let them do it. That was worth the time savings to me. So I did the rotors, pads, and sensors then had them do the fluid.

__________________
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)