Acura 2010 RL Owner's Manual page 282

Remote Audio Controls
On all models except Hawaiian
If you are listening to XM Radio, use
the CH button to change channels.
Each time you press the top ( ) of
＋
the button, the system goes to the
next preset channel. Press the
bottom ( ) to go back to the
−
previous preset channel.
To select a different channel of the
category you are listening to, press
and hold the top ( ) or bottom ( )
＋ −
of the CH button until you hear a
beep.
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2010 RL