92 Safety and Security
Anti-theft systems
Arming tow-away alarm
Lock your vehicle with the SmartKey.
The tow-away alarm is automatically 
armed after about 30 seconds.
Disarming tow-away alarm
To prevent triggering the tow-away alarm, 
switch off the tow-away alarm feature be-
fore towing the vehicle, or when parking on 
a surface subject to movement, such as a 
ferry or auto train.The switch is located on the lower part of 
the center console.
1Indicator lamp
2Tow-away alarm deactivation switch
Switch off the ignition (page 37).
Remove the SmartKey from the starter 
switch.
Press tow-away alarm deactivation 
switch2.
Indicator lamp1 in the tow-away 
alarm deactivation switch comes on 
briefly.
Exit your vehicle.
Lock your vehicle with the SmartKey.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.
Canceling tow-away alarm
To cancel the alarm:
Press theŒ or‹button on the 
SmartKey.
or
Insert the SmartKey in the starter 
switch.
iWhen you unlock your vehicle, the tow-away 
protection disarms automatically. The tow-away 
alarm remains disarmed until you lock the 
vehicle again.
iYou cannot disarm the tow-away alarm while 
the ignition is switched on. 
266 Controls in detail
Useful features
Roadside Assistance button•
The Roadside Assistance button• is 
located in the center armrest 
storage/telephone* compartment 
(
page 253).
1Roadside Assistance button
Open the storage/telephone* com-
partment (
page 253).
Press and hold button 1 (for longer 
than 2 seconds).
A call to a Mercedes-Benz Roadside 
Assistance dispatcher will be initiated. 
The button will flash while the call is in 
progress. The message 
Connecting 
Call
 will appear in the multifunction 
display and the audio system is muted.
When the connection is established, the 
message 
Call Connected appears in the 
multifunction display. The Tele Aid system 
will transmit data generating the vehicle 
identification number, model, color and lo-
cation (subject to availability of cellular 
and GPS signals).
A voice connection between the Roadside 
Assistance dispatcher and the occupants 
of the vehicle will be established.
Describe the nature of the need for 
assistance.The Mercedes-Benz Roadside Assistance 
dispatcher will either dispatch a qualified 
Mercedes-Benz technician or arrange to 
tow your vehicle to the nearest 
Mercedes-Benz Center. For services such 
as labor and/or towing, charges may 
apply. Refer to the Roadside Assistance 
manual for more information.
The following is only available in the USA:
Sign and Drive services: Services such 
as jump start, a few gallons of fuel or 
the replacement of a flat tire with the 
vehicle spare tire are obtainable.