CG!!

hey i'm not sure if the X5 for 2001 had the bluetooth module installed or equipped for the vehicle(not likely) that button is probaly for the "old style" car phone that were using the motorola's star-tacs or model(can't remember model name) after it but those where not bluetooth enabled.

Also the manuals were not used for Phone features so don't waste anymore time with those usually there was another booklet that cam with the Manual the features all the phone options providing the vehicle had a phone installed.
hope this helps....

Also does the vehicle have a Phone cradle?