CITROEN C4 Cactus Handbook & Instructions page 249

04 RADIO
Activate/ Deactivate RDS
Press on Media to display the primary page
then go to the secondary page.
Select "Settings".
Select "Radio".
Activate/deactivate "RDS options".
RDS, if activated, allows you to continue listening to the same
station by automatic retuning to alternative frequencies. However, in
certain conditions, coverage of an RDS station may not be assured
throughout the entire country as radio stations do not cover 100 % of
the territory. This explains the loss of reception of the station during
a journey.
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