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Display overview of the on-board com-
puter
The display of the on-board computer shows
the following menus and functions of Audio
15: Menu Function
Naviga-
tion sys-
tem Route guidance
Radio Selects the stored stations on
the current waveband
SD/USB Selects tracks in the current
folder
Tele-
phone Accepts a call
Ends/rejects a call
Performs calls via the phone
book menu
Performs calls via call lists
BT Audio Selects a track
i
The operation of certain functions is
described in the sections on basic func-
tions, radio, SD memory card, USB device
and Bluetooth ®
. Basic functions
Switching on/off
X Press the 0043on/off button.
Once switched on, Audio 15 calls up the
most recently active function.
i Audio 15 switches itself off automatically
when you remove the ignition key.
i Audio 15 switches itself off automatically
when the condition of charge of the battery
is low.
i If Audio 15 is on while the ignition is
switched off, it will switch itself off auto-
matically after approximately 30 minutes
to save the vehicle battery. Setting the volume
X Turn the volume control 0041during play-
back.
or X Press the 0081or0082 button on the steer-
ing wheel. Activating/deactivating the mute
function
X Press the 0063button.
The sound from the audio source is
switched on or off. When the sound has
been muted, the 008Esymbol is shown in
the status bar.
i If you change the audio source or adjust
the volume, the sound switches on again
automatically.
i When the mute function is active, play-
back from the SD memory card, USB device and BT audio is paused. When you deacti-
vate the mute function, playback will
resume from the position where it was
paused. Rear view camera
Important safety notes !
Objects that are not at ground level
appear further away than they actually are,
for example:
R the bumper of the vehicle parked behind
R the drawbar of a trailer
R the ball coupling of a trailer tow hitch
R the tail-end of a truck
R slanted posts
Only use the camera guide lines for orien-
tation. Do not get any closer to objects than the lowest horizontal guide line. You may
otherwise damage your vehicle and/or the
object. 14
Basic functionsAt a glance
Page 43 of 54

Ejecting an SD memory card
X
Press the SD memory card.
Audio 15 ejects the SD memory card.
X Remove the SD memory card. Connecting a USB device
The port for USB devices is located in the
stowage compartment on the driver's side of
the instrument panel.
X Connect the USB device to the USB port in
the correct position.
Audio 15 automatically activates USB
mode and loads the files.
The display shows Reading USB Reading USB
device...
device...
i If Audio 15 cannot find any readable files
on the USB device, the display shows No
No
Playable Files
Playable Files.
Information on readable file formats can be
found in the technical data (Y page 50).
i Due to the wide range of USB devices
available on the market, playback cannot
be guaranteed for all USB device brands.
Information about suitable USB devices
can be obtained from an authorized
Mercedes-Benz Center. Selecting the SD/USB function
X Press the 00FDbutton repeatedly, until the
display in the menu bar shows SD
SD/USB USB.
Playback starts.
Alternatively, you can select the SD function
in the main menu bar.
X Press the 0063button repeatedly until the
main menu bar is selected.
X Select Audio
Audio.
The display shows all available audio sour-
ces in a selection list. X
Select SD SD/USB
USB.
Playback starts.
You can also select the SD/USB function
accordingly when one of the other audio func-
tions is active.
X Press the 0080(SD)/0082 (USB) button.
or
X Press the 0064button repeatedly until the
menu bar is selected.
X Select Media Media.
The display shows all available audio sour-
ces in a selection list. X
Select SD SD/USB
USB.
Playback starts.
i If there is already an SD memory card
inserted, you can see the name of the SD
memory card instead of SD
SD. SD memory card and USB device
41Audio Z
Page 49 of 54

X
Press the 0064button repeatedly until the
menu bar is selected.
X Select BT Audio
BT Audio.
The currently selected playback option is
indicated by the 0036dot. X
To select a playback option : selectNor‐ Nor‐
mal Track Sequence
mal Track Sequence orRandom Tracks
Random Tracks .
You will hear the tracks in the desired play-
back option. If you have selected Random
Random
Tracks
Tracks, the display in the display/selec-
tion window shows Random Randomin front of the
symbol for the audio device.
X To exit the menu: press the0038button. Setting the volume
If you play audio files from a Bluetooth ®
device, it is possible that the volume may
need to be significantly increased. You can
therefore select from two volume options: Volume
option Operation
Standard
The Bluetooth
®
device is
played back at a normal vol-
ume. Boost
The Bluetooth
®
device is
played back louder. X
Press the 0064button repeatedly until the
menu bar is selected.
X Select BT Audio
BT Audio. X
Select Volume Volume.
The current volume option is identified by
the 0036dot. X
To select the volume option : select
Standard Standard orBoost
Boost.
You have set the volume option.
X To exit the menu : press the0038button. AUX function
Connecting an external device
You can connect an external device to Audio
15 and play it back via the speakers.
The AUX jack intended for this purpose
(3.5 mm stereo audio jack) is located in the
stowage compartment on the driver's side of
the dashboard.
X Connect an external device to the AUX
jack.
i An adapter cable is required for the AUX
jack.
i If you connect an external device, Audio
15 does not automatically switch over to
the AUX function. Selecting the AUX function
X Press the 00FDbutton repeatedly until the
display shows Aux Aux.
Audio 15 plays the external device and pro-
duces sound through the loudspeakers
again. AUX function
47Audio Z