146 Controls in detailUseful features
Emergency calls
An emergency call is initiated automatical-
ly:
following an accident in which the 
emergency tensioning detractors 
(ETDs) or airbags deploy,
if the anti-theft alarm or the tow-away 
alarm stays on for more than 
20 seconds. See anti-theft alarm sys-
tem (
page 71) and tow-away alarm 
(
page 72).
An emergency call can also be initiated 
manually by opening the cover next to the 
interior rear view mirror labeled SOS, then 
briefly pressing the button located under 
the cover. See below for instructions on 
initiating an emergency call manually.Once the emergency call is in progress, the 
indicator lamp in the SOS button will begin 
to flash. All information relevant to the 
emergency, such as the location of the ve-
hicle (determined by the GPS satellite loca-
tion 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 af-
ter the emergency call has been initiated. 
When a voice connection is established the 
audio system mutes. The Response Center 
will attempt to determine more precisely 
the nature of the accident provided they 
can speak to an occupant of the vehicle.
Warning!
G
The Tele Aid control unit is located under the 
driver’s seat. If there is accumulation of wa-
ter or other liquid in this area, the Tele Aid 
control unit could suffer an electrical short 
circuit making the system inoperative. In 
this case the indicator lamp in the SOS but-
ton does not illuminate during or remains il-
luminated after the system self-check. Have 
the system checked at the nearest Mer-
cedes-Benz Center as soon as possible.