CITROËN DS 4 Handbook page 400

digital radio
Digital radio provides a superior audio
quality and also additional categories of
traffic announcements (TA INFO).
The different "multiplex services"
offer a choice of radio stations in
alphabetical order.
Change band (FM1, FM2, DAB, ...)
Change of station within the same
"multiplex service".
Start a search for the next "multiplex
service".
Long press: select the desired
categories of announcements from
Transport, News, Entertainment and
Flash special (availability according
to the station).
When the radio station is displayed in
the screen, press on "OK" to display
the contextual menu.
(Frequency hopping (RDS), DAB / FM
auto tracking, RadioText (TXT) display,
Information on the station, ...)
dAB / FM tracking
"DAB" does not have 100% coverage of
the country.
When the digital signal is weak,
"DAB / FM auto tracking" allows you to
continue listening to the same station,
by automatically switching to the
corresponding analogue "FM" station
(if it exists).
Press the "Menu" button.
Select "Multimedia" and confirm.
Select "dAB / FM auto tracking"
and confirm
If "DAB / FM auto tracking" is on, there
will be a difference of a few seconds
in the programme when the system
changes to analogue "FM" radio, with
sometimes a variation in volume.
When the strength of the digital signal
is good again, the system automatically
switches back to "DAB"
If the "DAB" station you are listening
to is not available on "FM" ("dAB/FM"
option barred), or if "DAB / FM auto
tracking" is not on, the sound will be cut
when the digital signal is too weak.