Page 70 of 168
69
Important notes
Telephone operation
Phone book
SMS (Mail)
Telephone*
Page 71 of 168

70 Telephone*Important notes1 Observe all legal requirementsWarning
G
Some jurisdictions prohibit the driver from
using a cellular telephone while driving.
Whether or not prohibited by law, for safety
reasons, the driver should not use the cellu-
lar telephone while the vehicle is in motion.
Stop the vehicle in a safe location before
placing or answering a call.
If you nonetheless choose to use the cellular
phone while driving, please use the hands-
free device and be sure to pay attention to
the traffic situation at all times. Use the cel-
lular phone
1 only when road, weather and
traffic conditions permit.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
Warning
G
Never operate radio transmitters provided
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to malfunction
of the vehicle's electronic system, possibly
resulting in an accident and/or personal
injury.
Page 72 of 168

71 Telephone*
Important notes
Please read chapter “Telephone*” be-
fore attempting to operate your tele-
phone.
Always drive with extreme caution
when operating the telephone hands-
free.
For safety reasons, the mobile tele-
phone handset should not be used to
place or receive a call while driving.
If the signal is very weak (display in the
status bar):
Wait until reception improves before
placing a call.
iOnce the mobile phone is inserted into
the telephone cradle*, it can be operat-
ed:
using the cell phone itself,
using the COMAND control unit,
using the multifunction steering
wheel, or
using the voice control system*.
Descriptions in this Operator’s Manual
presume that the mobile phone is in-
serted into the telephone cradle*.
iThis Operator's Manual describes op-
eration of the telephone using the
COMAND control unit and the multi-
function steering wheel. Unless other-
wise specified, the descriptions and
the illustrated displays refer to the
COMAND control unit.
Operation of the mobile phone and
voice control system* are explained in
separate operation guides.!Radio transmitters, such as a portable
telephone or a citizens band unit,
should only be used inside the vehicle if
they are connected to a separate exte-
rior antenna approved by Mercedes-
Benz.
Page 73 of 168

72 Telephone*Important notes
Close the windows and reduce all ex-
ternal noise as much as possible when
using hands-free operation.
Make sure that the air vents are not
pointed in the direction of the micro-
phones 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 automatically at-
tempts to again sign on with a network.
If the message Enter unlock code is
displayed, enter the unlock code
(page 76). Only then will you be able
to use all the telephone functions.
You will still be able to make 911 emer-
gency calls (
page 74) if the tele-
phone is locked. The telephone cannot, or not yet, be used
in the following situations:
The telephone is already unlocked, but
it is not yet registered with the net-
work.
The message NO SERV. appears in the
status bar. The telephone automatical-
ly attempts to register with a network.
If there is no network available, “911”
emergency calls can NOT be placed.
If you try to place an outgoing call, the
message Call not possible is dis-
played temporarily.
If the message Telephone being
activated, please wait is dis-
played,
If the message Please insert phone
is displayed.
Insert the cell phone into the tele-
phone cradle*.
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73 Telephone*
Telephone operation
Telephone operation
Switching ON
The telephone* is switched ON automati-
cally when COMAND is activated. The mo-
bile phone must be readily inserted into
the cradle*.
If COMAND is switched ON, the switched
OFF telephone* can also be switched ON
manually:
Press and hold for a few seconds
until the telephone* is switched ON.
The Telephone main menu appears
(page 77).One of the following messages could also
appear:
Please insert phone
Insert the mobile phone into the
cradle*.
Phone not installed
Your vehicle is not configured for cellu-
lar telephone operation.
Please insert SIM card
This message appears only when using
a GSM cell phone.
Insert a SIM card (
Telephone Op-
eration Guide).Switching OFF
in the Telephone main menu
(page 77), press and hold for
longer than 2 seconds.
or
Switch COMAND OFF (
page 28).
The telephone* switches OFF after a
one-minute delay. If a call is in progress
during this time, the telephone switch-
es OFF approx. one minute after the
call is terminated.
Switching the phone ON/OFF
iIf a call is in progress (handsfree) you
cannot switch the COMAND OFF, is
disabled.
Page 75 of 168

74 Telephone*Telephone operationThe 911 emergency call will also function if
the telephone is locked.
Placing an emergency call
An emergency call can be placed using the
cell phone or the COMAND control unit.Using the cell phone
(
Telephone Operation Guide).
Using the COMAND control unit during
PIN or unlock code entry
Press the 911 soft key.
The system opens an inquiry menu
prompting you if you want to dial a
911 call.
If necessary, press to select Yes.
Press to confirm Yes if you want to
place the 911 emergency call.
The emergency call will be placed.
Wait until the emergency call center
answers, then describe the emergency.
If you do not want to place the emergency
call:
Press to select No when the inquiry
menu appears.
Press to confirm No.
Using the COMAND control unit after
PIN and unlock code entry
Press repeatedly until the Tele-
phone main menu appears.
911 emergency callsWarning
G
The “911” emergency call system is a
public service. Using it without due
cause is a criminal offense.iThe following conditions must be met
for a “911” emergency call:
telephone switched ON
available cell phone network
If you cannot make an emergeny call,
you will have to initiate rescue mea-
sures yourself.
Page 76 of 168

75 Telephone*
Telephone operation
In succession, press the number keys ,
and .
Press.
The telephone establishes the connec-
tion, the ringing tone is audible.
Wait until the emergency call center
answers, then describe the emergency.
The PIN protects the telephone against un-
authorized use. Your PIN is found in the
telephone service provider's documenta-
tion.Commit your PIN to memory.
Most telephone functions are not available
before entering the PIN.
Press the corresponding number key
- for each digit.
In case of erroneous entry, delete the
last or more digits:
Press the Delete soft key as often
as required.
Once all digits have been entered,
press the OK soft key.
If the input is correct, the telephone
will log itself into the network.
Upon being logged-in, the telephone
service provider's name is displayed in
the status bar.
If the input is incorrect, message
Wrong PIN number will appear briefly.
Re-enter the PIN.
Entering the PIN (only GSM) iIf a GSM cell phone is used, a PIN may
also have to be entered.
The PIN may be entered on the mobile
phone itself (
Telephone Operation
Guide).
iThe telephone cannot be used before it
is logged- in.
Page 77 of 168

76 Telephone*Telephone operation
After three incorrect entries, the SIM
card is blocked. Message SIM card
blocked will appear briefly.
The PUK has to be entered.
(Telephone Operation Guide)
The unlock code protects the telephone
against unauthorized use. The unlock code
can be activated on the telephone
(
Telephone Operation Guide).
Memorize the unlock code!
The telephone functions are available only
after entering the unlock code.Example: unlock code 2307
In sequence, press the number
keys", #, and !.
In case of erroneous entry, delete the
last or more digits:
Press the Delete soft key as often
as required.
After entering all digits, press or the
OK soft key.All telephone functions are available if
the correct number has been entered.
After registering, Ready or Roaming ap-
pears in the center of the status bar.
The unlock code has to be entered
again if the entry was incorrect.
When COMAND is switched ON, switching
to telephone mode from any other opera-
tion mode is made as follows:
On the COMAND control unit:
Press.
The Telephone main menu opens
(page 77).
On the multifunction steering wheel:
See (
page 23)
Entering the unlock code iThe system switches back to last mode
if the unlock code is not entered within
8 seconds after you are prompted to do
so.
Switching to telephone mode