Page 111 of 242

109 Rear Audio/Video*
Rear Seat Entertainment (RSE) operation*
Set the L/R monitor switch on the
remote to the side you wish to control.
Press or on the remote.
If an external video source is not
connected the AUX menu appears. You
can set bass and treble for the AUX
operation (
page 113).
AUX menu
If an external video source is connec-
ted (
page 96) and switched to play-
back the AUX menu will only appear
briefly.
Playback begins automatically.
If the external video source is
disconnected during playback the
system switches back to the AUX
menu.
Displaying the soft keys during
playback
Turn or press the thumb wheel.
The soft keys and the status bar are
displayed.To remove the soft key display
The soft keys and the status bar disappear
after approx. 10 seconds.
or
Turn the thumb wheel to highlight the
Full scn. soft key and press to
select.
Switching to AUX mode
i
For instructions on how to operate the
external video sources, please see the
operation manual of the device con-
nected.
Page 112 of 242

110 Rear Audio/Video*
Rear Seat Entertainment (RSE) operation*
Soft key functions
4:3, 16:9 or Zoom soft key:
You can change the aspect ratio.
Full scn. soft key:
The soft key display disappears.
Tone soft key:
Brings you to the tone menu, where you
can set Bass and Treble (
page 108).
Bright., Contr. and Color soft
key
s:
Allow you to adjust brightness, cont-
rast and color (
page 108).
Changing the aspect ratio
You can manually change the aspect ratio
during playback. To do this, use the top left
soft key. The soft key changes each time
you press the thumb wheel. Possible aspect ratios are:
4:3, 16:9 and
Zoom.
The soft key indicates the aspect ratio to
which you will change when you press the
thumb wheel.
Turn the thumb wheel to highlight the
top left soft key and press the thumb
wheel in succession until the desired
aspect ratio is set.
Displaying full screen
Turn the thumb wheel to highlight the
Full scn. soft key and press to se-
lect.
The soft keys disappear. The full screen
will appear.You can set the settings for both monitors
separately. To switch between monitors
(
page 90).
Press on the remote.
The System menu will appear.
M class illustrated
System settings
Page 113 of 242

111 Rear Audio/Video*
Rear Seat Entertainment (RSE) operation*
You can use the following functions:
Bright. soft key:
Adjusts the display brightness.
Design soft key:
Sets the display dimming characteris-
tics.
Pic off soft key:
Switches the monitor off and on. This is
also possible by pressing on the
remote (
page 113).
Lang. soft key:
Selects the language for the menu text
displays.
Speaker soft key:
Selects the source of the speakers
(
page 112).Adjusting the display brightness
Turn the thumb wheel to highlight the
Bright. soft key and press to select.
Press H or h direction to adjust the
brightness.
Press E.
The setting is applied. The System
menu will appear.
Setting the display dimming characteri-
stics
Turn the thumb wheel to highlight the
Design soft key and press to select.
Press G or g to select an entry.
Day Mode
The display is continuously set to
daylight design.
Night Mode
The display is continuously set to night-
time design.
Automatic
The display changes depending on the
ambient light sensor in the vehicle.
Press E.
The setting is applied. The System
menu will appear.
Switching the monitor on and off
Turn the thumb wheel to highlight the
Pic off soft key and press to select.
The monitor is switched off.
Press the thumb wheel again.
The monitor is switched on again.
Page 114 of 242

112 Rear Audio/Video*
Rear Seat Entertainment (RSE) operation*
Selecting the language
Turn the thumb wheel to highlight the
Lang. soft key and press to select.
The languages list will appear.
Press G or g to select the desired
language.
or
Select Instrument cluster.
The display will use the same language
as is set in instrument cluster.
Press E.
The setting is applied. The System
menu will appear.Selecting the source of the speakers
If two audio sources (eg audio CD and
AUX 2) are playing back simultaneously,
one at the left monitor the other at the
right monitor, you can select which source
can be played through the vehicle
speakers via the COMAND AUX channel.
At the COMAND, you can set the volume,
bass and treble, balance and fader and
sound functions* (
page 82).
Turn the thumb wheel to highlight the
Speaker soft key and press to select.
Press G or g to select Left
source
or Right source.
Press E.
The setting is applied. The System
menu will appear.RSE is set to playback
At the COMAND open the Audio menu
(
page 42).
Press the AUX soft key.
Playback begins.
Press during playback (CD or
MP3 CD mode, DVD mode).
The respective operation is muted and
theß symbol is displayed in the status
bar of the corresponding main menu.
Press again.
Playback will resume.
The ß disappears from the status bar.
RSE audio playback through
speakers
Muting on/off
Page 115 of 242
113 Rear Audio/Video*
Rear Seat Entertainment (RSE) operation*
In the CD menu (page 98), MP3 CD
menu (
page 100) or AUX menu
(
page 109) turn the thumb wheel to
highlight the
Bass or Treble soft key
and press to select.
Press H or h.
Bass or Treble is adjusted.
Press E or wait until the display
changes.
The new setting is saved.
Press on remote.
The monitor is switched off.
Press on remote again.
The monitor is switched on again.
Setting bass and treblei
Press H or h and keep it depressed
to move the slider continuously.
Release the soft key to set the current
value.
Monitor off /on
Page 130 of 242

128 Telephone*
Important notes
Please read the chapter “Telephone”
first before attempting to operate your
telephone.
Please also read the important notes in
the telephone operating manual.
Always drive with extreme caution
when you operate the telephone
hands-free.
For safety reasons, you should not use
the mobile telephone handset to make
a call while driving the vehicle.
If the signal strength is very weak (dis-
play in the symbol bar of all menus):
Wait until reception improves before
making a call.
Close the windows and reduce all out-
side noise as much as possible when
you use hands-free operation.
Also make sure that the air vents are
not pointed in the direction of the
microphones located in the overhead
control panel near the rear view mirror.
Adjust air vents and/or reduce blower
speed if necessary.
A brief disconnection from the cellular
network is not a malfunction, as this
can occur when the network switches
areas. The phone will automatically try
to sign on to a network again.
If the message Please enter Lock-
Code
appears, enter the unlock code
to enable all telephone functions
(
page 133). If you do not do so, only
the emergency call (911) is available.
GSM mobile phone
If the message Please enter PIN-
Code
on the mobile phone appears, en-
ter the PIN-code to enable the telepho-
ne functions (
page 133). If you do
not do so, only the emergency (911)
call is available on the mobile phone.In the following situations, it is not possible
or not yet possible to use the telephone:
The telephone is already unlocked but
is not or not yet registered in the net-
work.
The message
No Serv appears in the
status bar. The telephone will try to re-
gister into an existing network. If the
network is available, the telephone will
be ready for use.
The above message also appears
if the network is no longer available
due to weak signals
Page 209 of 242

207 Navigation*
Software Updates
Loading
Insert the new navigation DVD into the
DVD slot with the label side up.
The message
Navigation is
initializing. Please wait.
will
appear.
Press l on the display unit to return
the display unit to its closed position.
The display unit tilts up and then moves
to the rear.After that, the COMAND loads the
software on the DVD.
Shortly after that, the progress bar
appears. After some time, the progress
bar reaches 100%.
The update is completed. You can now
operate the navigation system again.
i
Inserting a second DVD with another
DVD still loaded will cause damage to
the DVD drive which is not covered by
the Mercedes-Benz Limited Warranty.
i
The message Press EJECT to
close
will appear. If l on the
display unit is not pressed within 20
seconds, eight successive series of two
beep tones will sound to remind you to
return the display to its closed position
by pressing l on the display unit.
If you do not do so, the COMAND
returns the display unit to its closed
position.
Page 230 of 242

228 Glossary
Regional code
The regional code prevents video DVDs
from being played on DVD players not
having the same code as the ->DVD.
The factory setting of the Rear Seat En-
tertainment* CD/DVD player is code
1. It can only play back video DVDs also
having code 1 or no code.
Roaming
For this function, the telephone uses
the telephone network of a contract
partner. The ROAMING indicator in the
COMAND display indicates that a call is
being made using a contract partner.
Root directory
The uppermost directory on a storage
medium.
Scan rate (MP3)
Indicates the frequency at which volt-
age samples are taken during the con-
version of an analog signal into a digital
signal. The analog-to-digital converter
converts the samples into digital sig-
nals.Service source
This includes the systems telephone*
and navigation (voice output during
destination guidance)
SIM
(Subscriber Identity Module)
Card provided by the GSM telephone
service provider. Necessary for acces-
sing a mobile communication network.
SMS
(S
hort Message Service)
With this function you can receive and
read short text messages (if SMS ser-
vice is provided by your provider)
Soft keys
Keys that activate different functions.
Function of key depends on the selec-
ted operating mode.
Subtitle
A textual representation of the spoken
audio in a video program.Tele Aid*
(Tele
matic Alarm Identification on De-
mand)
The Tele Aid system consists of three
types of response: automatic and ma-
nual emergency, roadside assistance,
and information. Tele Aid is initially
activated by completing a subscriber
agreement and placing an acquain-
tance call. Refer also to the vehicle
operating instructions.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is char-
ged, properly connected, not damaged,
and cellular and GPS coverage is avai-
lable.
Unlock code
Your unlock code prevents unauthori-
zed persons from using your telephone.
The unlock code is a number string
you must enter when switching
on the telephone if you have locked
the phone before turning it off or if the
phone is set to lock automatically.