Page 131 of 167
Introduction................................ 132
Basic operation .......................... 138
Radio ......................................... 142
External devices ........................147
Speech recognition ....................150
Phone ........................................ 151
Index .......................................... 158R300 BT
Page 132 of 167

132IntroductionIntroductionGeneral information...................132
Theft-deterrent feature ...............133
Control elements overview ........134
Usage ........................................ 136General information
The Infotainment system provides
you with state-of-the-art in-car
infotainment.
Using the FM, AM or DAB radio
functions, you can register a large
number of stations on different
favourites pages.
You can connect external data
storage devices to the Infotainment
system as further audio sources;
either via a cable or via Bluetooth ®
.
The digital sound processor provides
you with several preset equaliser
modes for sound optimisation.
In addition, the Infotainment system is equipped with a Phone portal that
allows comfortable and safe use of
your mobile phone in the vehicle.
Optionally, the Infotainment system
can be operated using the control
panel or the controls on the steering
wheel, or - if provided by your mobile
phone - via speech recognition.
Notice
This manual describes all options
and features available for the
various Infotainment systems.Certain descriptions, including those
for display and menu functions, may
not apply to your vehicle due to
model variant, country
specifications, special equipment or
accessories.
Important information on
operation and traffic safety9 Warning
Drive safely at all times when
using the Infotainment system.
If in doubt, stop the vehicle before operating the Infotainment
system.
Radio reception
Radio reception may be disrupted by static, noise, distortion or loss of
reception due to:
● changes in distance from the transmitter
● multi-path reception due to reflection
● shadowing
Page 135 of 167

Introduction1351X......................................... 136
If switched off: short press:
switch power on
If switched on: short press: mute system; long press:
switch power off
Turn: adjust volume
2 RADIO
Activate radio or change
waveband ........................... 142
3 MEDIA
Activate media or change
media source ...................... 148
4 t v
Radio: short press: skip to
previous or next station;
press and hold: seek down or up .................................... 142
External devices: short
press: skip to previous or
next track; press and hold:
rewind or fast forward .........1485PHONE
Short press: open phone
menu ................................... 151
Long press: activate
speech recognition ..............150
6 BACK
Menu: one level back ..........138
Input: delete last character
or entire entry ......................138
7 MENU ................................. 138
Turn: mark screen buttons or menu items; set
numeric values
Press: select/activate a
marked screen button or
menu item; confirm set
value; switch to different
setting option; open
application-specific menu
(if available)8 Softkeys
Favourites: press: select
favourites; press and hold:
save radio stations as
favourites ............................ 143
Menu: press: select
corresponding screen
button .................................. 138
9 FAV
Press: display favourites
bar ....................................... 143
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136IntroductionSteering wheel audio controls
1qw
Short press: accept phone
call ....................................... 151
or dial number in call list .....154
With Phone portal active
and calls waiting: short
press: switch between calls 154
Long press: activate
speech recognition ..............150
2 SRC (Source) ...................... 136
Press: select audio source ..136
With radio active: turn
upwards/downwards to
select next/previous
preset radio station .............142
With Phone portal active
and call list open: turn
upwards/downwards to
select next/previous entry
in call list ............................. 154
3 w
Increase volume .................. 136
4 ─
Reduce volume ...................136
5 xn
Short press: end/decline
call ....................................... 154
or close call list .................... 154
or deactivate speech
recognition .......................... 150
or activate/deactivate mute . 136Usage
Control elements
The Infotainment system is operated
via function buttons, a MENU knob
and menus that are shown on the display.
Inputs are made optionally via: ● the control panel on the Infotainment system 3 134
● audio controls on the steering wheel 3 134
● the speech recognition 3 150
Switching the Infotainment
system on or off
Press X briefly. After switching on,
the last selected Infotainment source
becomes active.
Press and hold X again to switch the
system off.
Automatic switch-off
If the Infotainment system is switched
on by pressing X while the ignition is
switched off, it switches off again
automatically after 10 minutes.
Page 137 of 167

Introduction137Setting the volumeTurn m; the current setting is shown
on the display.
When the Infotainment system is
switched on, the last selected volume is set, provided that the volume is
lower than the maximum start-up
volume 3 139.
Speed compensated volume
When Auto volume is activated
3 139, the volume is adapted
automatically to make up for the road
and wind noises as you drive.
Mute function
Press m to mute the audio sources.
To cancel the mute function: turn m.
Modes of operation Radio
Press RADIO to open the radio main
menu or to toggle between the
different wavebands.
For a detailed description of the radio
functions 3 142.External devices
Press MEDIA repeatedly to activate
the playback mode for a connected
external device (e.g. USB device,
Bluetooth device).
For a detailed description on
connecting and operating external
devices 3 147.
Phone
Press PHONE to establish a
Bluetooth connection between the
Infotainment system and a mobile phone.
If a connection can be established,
the main menu of the phone mode is
displayed.
For a detailed description of mobile
phone operation via the Infotainment
system 3 154.
If no connection can be established,
a corresponding menu is displayed.
For a detailed description of
preparing and establishing a
Bluetooth connection between the
Infotainment system and a mobile phone 3 152.
Page 147 of 167

External devices147External devicesGeneral information...................147
Playing audio ............................. 148General information
A USB port for the connection of
external devices is located in the
centre console behind the parking brake or underneath the armrest.
Two USB ports for charging devices
only are located at the rear of the
centre console.
Notice
The USB port must always be kept
clean and dry.
USB port
An MP3 player, USB drive or
smartphone can be connected to the
USB port.
When connected to the USB port, the devices mentioned above can be
operated via the controls and menus
of the Infotainment system.
Notice
Not all auxiliary devices are
supported by the Infotainment
system.
The Infotainment system can play
music files contained in USB storage
devices.Connecting/disconnecting a device
Connect the USB device to the USB
port.
Notice
If a non-readable USB device is
connected, a corresponding error
message appears and the
Infotainment system automatically
switches to the previous function.
To disconnect the USB device, select
another function and then remove the USB storage device.Caution
Avoid disconnecting the device
during playback. This may
damage the device or the
Infotainment system.
MTP device settings
For devices connected via MTP,
additional settings can be adjusted in
the settings menu.
In an active audio source, press
MENU , scroll through the list and
select Settings . Select Phone
Connection (MTP Only) .
Page 148 of 167

148External devicesIf you want the device to be only
charged on the USB port, activate
Charge Only . If you switch to the USB
audio source while this setting is
activated, you are prompted with a
charging message.
If you wish to play music files stored
on the device, activate Scan Music
Folder Only or Scan All Folder .
Bluetooth Bluetooth enabled audio sources
(e.g. music mobile phones, MP3
players featuring Bluetooth, etc.),
which support the Bluetooth music profiles A2DP and AVRCP can be
connected wirelessly to the
Infotainment system.
The Infotainment system can play
music files contained in Bluetooth
devices.
Connecting/disconnecting a device
For a detailed description of the
Bluetooth connection 3 152.Bluetooth device list
To access the Bluetooth device list,
activate the Bluetooth audio source,
press MENU and then select Manage
Bluetooth Devices .
For a detailed description of the Bluetooth device list 3 152.
File formats Only devices formatted in the FAT32,
NTFS and HFS+ file systems are
supported.
Notice
Some files may not be played
properly. This may be due to a
different recording format or the
condition of the file.
Files from online shops to which
Digital Rights Management (DRM)
has been applied cannot be played.
The playable audio file formats are
MP3, WMA, AAC and AIF.
When playing a file with ID3 tag
information, the Infotainment system
can display information, e.g. on the
track title and artist.Playing audio
Starting playback Connect the device 3 147.
Repeatedly press MEDIA to activate
the desired media source.
Example: USB source.
Function buttons
Skipping to previous or next file
Press t or v to play the previous
or next track.
If t is pressed within the first five
seconds of the song playing, the
system skips to the beginning of the
current track.
Fast forwarding or rewinding
Press and hold t or v to rewind or
fast forward.
Page 150 of 167

150Speech recognitionSpeech recognitionGeneral information...................150
Usage ........................................ 150General information
The voice pass-thru application of the Infotainment system allows access tothe speech recognition commands on
your smartphone. See your
smartphone manufacturer's
operating instructions to find out
whether your smartphone supports this feature.
In order to use the voice pass-thru
application, the smartphone must be
connected to the Infotainment system
via USB cable 3 147 or via Bluetooth
3 152.
Usage
Activating speech recognition Press and hold PHONE on the control
panel or 7w on the steering wheel to
start a speech recognition session. A voice command message is
displayed on the screen.
As soon as a beep is heard, you can
say a command. For information on
the commands supported, see the
operating instructions for your
smartphone.Adjusting the volume of voice
prompts
Turn m on the control panel or press
+ / - on the right side of the steering
wheel to increase or decrease the volume of voice prompts.
Deactivating speech recognition
Press xn on the steering wheel.
The voice command message
disappears, the speech recognition
session is ended.