CITROËN DS 5 Handbook page 394

QUESTION
There is a difference in For optimum sound quality, the audio settings for Loudness,
sound quality between the Ambience, Treble, Bass, Volume can be adapted to the different
different audio sources. sound sources, which may result in audible differences when
changing source.
With the engine off, the When the engine is switched off, the system's operating time
system switches off after a depends on the state of charge of the battery.
few minutes of use. The switch-off is normal: the system switches to economy mode
and switches off to prevent discharging of the vehicle's battery.
ANSWER SOLUTION
Check that the audio settings for Loudness,
Ambience, Treble, Bass, Volume) are adapted
to the sources listened to. Adjust Balance,
Treble, Bassto the middle position, select the
"None" musical ambience and set the loudness
correction to the "Active" position in CD mode or
to the "Inactive" position in radio mode.
Start the vehicle's engine to increase the battery
charge.