R/T Button
 

The R/T button has nothing to do with the radio. It displays/hides the telephone book.

At least, that is what page 23 of my Owner's Manual says.

:)

Mine says "Switch between phone and radio,
cassette and CD." same page -23 What year is your X5?

It switches between Radio/Telephone and other sources provided you have a phone connected that works with the BMW system, otherwise it has no function.

2005

Only works if you have factory phone

:iagree:

i used to use this button while the switch on position 2 to add new handsets... today i was driving and pressed that button..and guess what... the CB showed an alarm "SELFLEVEL SUSP INACT"... i was about to cry why did i ready this subject.... then when i parked, turned off the X and then on the alarm is gone.. i read some threads immediately... they said this error is nothing to let you wory.... thank GOD...

You know, sometimes I wander the same thing because I read some of these threads and later experience them.... Like when I go downtown SA, my remote does not work, I have to use the key to lock the X:dunno: