Is the seat trim very loose?? If so alot of times the trim that hold the controls cracks. and the controls become unplugged. Most of the time changing the trim with a new one solves your problem, or a zip tie to hold the controls in place if the trim is still good. very common on the e39, and the e53 has the same seats.
99 540i sport, acs type 2's chrome, acs spler pdls,Euroclrs
04 745i aw sport,21's aib's acspedals& rf splr(sold)
00 328i Prem Aw18" 335spt whls(sold)
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06 750I aw, sport. chrome21's,acs pdls,acs rfsplr,mtecs,8k hid fogs,Leds.oem ipod&sirius
03 VIPER, forgelinewheels,tune,exhaust,intake.