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Audio system
176
R
READY indicates that a call is possible.
R
NO SERVICE indicates that the mobile net-
work is not available.
Setting transmit and receive volume
i
These settings should normally not be
changed as the factory settings are
matched to most mobile phones. Find out
about the optimum settings for your mobile
phone at an authorized Mercedes-Benz
Center.
i
Changes may result in significant impair-
ments to the transmission quality. These
settings may not be changed during an
active phone call.
X
h £ Phone £ Adjust Volume £
Reception Volume or Transmission
Volume.
X
Setting the volume: Press button $ or
%.
The volume bar moves up or down.
X
Confirming selection: Press button C.
Emergency calls “911”
i
The “911” emergency call system is a
public service. Using it without due cause
is a criminal offense.
i
This function places a call to the local 911
provider. It does not initiate a Tele Aid call.
The following describes how to dial a “911”
emergency call using the audio system head
unit when a Mercedes-Benz specified mobile
phone is connected via the Bluetooth
®
inter-
face to the audio system. Unless otherwise
specified, the descriptions refer to the audio
system head unit.
Consult the separate mobile phone operating
instructions that came with your mobile
phone for information on how to place a
“911” emergency call on the mobile phone.
The following conditions must be met for a
“911” emergency call via the audio system:
R
Mobile phone must be switched on.
R
The corresponding mobile communica-
tions network must be available.
i
Emergency calls may not be possible with
all telephone networks or if certain network
services and/or telephone functions are
active. Check with your local service pro-
viders.
If you cannot make an emergency call, you
will have to initiate rescue measures yourself.
GSM network phones
Placing a “911” emergency call using
audio control unit with the mobile phone
unlocked
X
Press h button to switch to telephone
mode.
X
Enter 911 using the number keypad on the
audio control unit.
X
Press s button.
Connecting... appears in the audio dis-
play while the mobile phone establishes the
connection.
X
Wait until the emergency call center
answers, then describe the emergency.
i
If no SIM card is in the mobile phone, with
a few types of mobile phones NO SERV-
ICE appears in the audio display. In that
case, you only can make an emergency call
on the mobile phone itself, without the use
of the audio control unit.
Controls in detail