Lexus LS460 2011 Owner's Manual page 445

RDS (Radio Data System)

Listening to stations of the same network
"AF" on, "REG" off modes: The station among those of the same
"AF" on, "REG" on modes: The station among those of the same
"AF" off, "REG" off modes:The "AF" function does not work.
Each time "AF" is touched, the mode changes in the order of "AF" on,
"REG" off  "AF" on, "REG" on  "AF" off, "REG" off.
LS460_EE
3-3. Using the audio system
Touch "AF" on the screen.
network with strong reception is
selected.
network with strong reception and
broadcasting the same program is
selected.
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