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216
Controls in detail
Useful features
The speaker volume of a Tele Aid call can
be adjusted when using the volume control
on the audio system or on the multifunc-
tion steering wheel. To raise, turn the rota-
ry volume control on the audio system
clockwise or press button æ on the
multifunction steering wheel. To lower,
turn the rotary volume control on the audio
system control counterclockwise or press
button ç on the multifunction steering
wheel.
System self-check
The system performs a self-test after you
have switched on the ignition.
Emergency calls
An emergency call is initiated
automatically following an accident in
Emergency Tensioning Devices (ETDs) or
air bags have deployed.
An emergency call can also be initiated
manually (
୴ page 217).
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. When
the connection is established, you see the
message
Call Connected
in the multifunc-
tion display.
All information relevant to the emergency,
such as the location of the vehicle (deter-
mined by the GPS satellite location sys-
tem), vehicle model, identification number
and color are generated.
Warning! G
If the indicator lamps in the SOS button, in
the Roadside Assistance button, and/or in
the Information button do not come on dur-
ing the system self-check, or if any of these
indicators remain illuminated continuously
in red and/or the message
Tele Aid
Inoperative
is displayed in the multifunc-
tion display after the system self-check, a
malfunction in the system has been
detected.
If a malfunction is indicated as outlined
above, the system may not operate as ex-
pected. In case of an emergency, help will
have to be summoned by other means. Have
the system checked at the nearest
Mercedes-Benz Center or contact the Re-
sponse Center at 1-800-756-9018 (in the
USA) or 1-888-923-8367 (in Canada) as
soon as possible.