Re-echoing others. One of the first things I do with any used BMW purchase is the entire (almost) cooling system. Water pump, thermostat, expansion tank, and hoses. Those parts are all on borrowed time over ~100k miles. I'll leave secondary pumps, radiators (except on m62 powered BMWs), and heater control valves if they show no signs of imminent failure.

Also don't like the idea of idling that long. Not for any real reason... Just couldn't see doing that.

__________________
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)