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Useful features
209
either of these signals are unavailable, the
Tele Aid system may not function and if this
occurs, assistance must be summoned by
other means.
To adjust the speaker volume during a Tele
Aid call do the following:
X
Press button æ or ç on the multi-
function steering wheel.
or
X
Use the volume knob on your audio system
or COMAND system headunit.
System self-test
The system performs a self-test after you
have switched on the ignition.
G
Warning!
If the indicator lamps in the SOS button, in
the Roadside Assistance button p and/
or in the Information button ¡ do not
come on during the system self-test, or if
any of these indicators remain illuminated
constantly in red and/or the message Tele
Aid Inoperative is displayed in the mul-
tifunction display after the system self-test,
a malfunction in the system has been
detected.
If a malfunction is indicated as outlined
above, the system may not operate as
expected. In case of an emergency, help
will have to be summoned by other means.
have to be summoned by other means.
Have the system checked at the nearest
Mercedes-Benz Center or contact the
Response Center at 1-800-756-9018 (in
the USA) or 1-888-923-8367 (in Canada) as
soon as possible.
Emergency calls
An emergency call is initiated automatically
following an accident in which the Emergency
Tensioning Devices (ETDs) or air bags deploy.
An emergency call can also be initiated man-
ually (Y page 210).
Once the emergency call is in progress, the
indicator lamp in the SOS button will begin to
flash. The message Connecting Call
appears in the multifunction display and the
audio system or the COMAND system is
muted. When the connection is established,
the message Call Connected appears in the
multifunction display.
All information relevant to the emergency,
such as the location of the vehicle (deter-
mined by the GPS satellite location system),
vehicle model, identification number and
color are generated.
A voice connection between the Response
Center and the occupants of the vehicle will
be established automatically soon after the
emergency call has been initiated. The
Response Center will attempt to determine
more precisely the nature of the emergency
provided they can speak to an occupant of
the vehicle.
i
If no vehicle occupant responds, an
ambulance will be sent to the vehicle imme-
diately.
G
Warning!
If the indicator lamp in the SOS button is
flashing continuously and there was no
voice connection to the Response Center
established, then the Tele Aid system could
not initiate an emergency call (e.g. the rel-
evant cellular phone network is not availa-
ble).
The message Call Failed appears in the
multifunction display for approximately
10 seconds.
Should this occur, assistance must be sum-
moned by other means.
Controls in detail