CITROEN C1 2015 Handbook page 244

Audio and Telematics
Settings, configuration
QUESTION
There is a difference in
sound quality between the
different audio sources
(radio, USB...).
With the engine off, the
system switches off after a
few minutes of use.
242
ANSWER
For optimum sound quality, the audio settings (Volume, Treble,
Medium, Bass) can be adapted to the different sound sources,
which may result in audible differences when changing source
(radio, USB...).
When the engine is switched off, the system's operating time
depends on the battery charge.
The switch-off is normal: the system changes to economy mode
and switches off to preserve the state of charge of the vehicle's
battery.
SOLUTION
Check that the audio settings are adapted to
the sources listened to. It is advisable to select
automatic sound adjustment (Low, Medium,
High).
Check the quality and format of your recording.
Start the vehicle's engine to increase the battery
charge.