208 Controls in detailUseful featuresTele Aid
Shortly after the completion of your Tele 
Aid acquaintance call, you will receive a 
user ID and password. By visiting 
www.mbusa.com and selecting “Tele Aid” 
(USA only), you will have access to account 
information, remote door unlock, and 
more.The Tele Aid system
(Tele
matic A
larm I
dentification on 
D
emand)
The Tele Aid system consists of three 
types of response:
automatic and manual emergency
Roadside Assistance
information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged, 
properly connected, not damaged and cel-
lular and GPS coverage is available.
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 buttonæ on the 
multifunction steering wheel. To lower, 
turn the rotary volume control on the audio 
system control counterclockwise or pressbuttonç on the multifunction steering 
wheel.
To activate, press the SOS button, the 
Roadside Assistance button• or 
the Information button¡, depend-
ing on the type of response required.
!The initial activation of the Tele Aid sys-
tem may only be performed by com-
pleting the subscriber agreement and 
placing an acquaintance call using the 
¡button. Failure to complete either 
of these steps will result in a system 
that is not activated.
If you have any questions regarding ac-
tivation, please call the Response 
Center at 1-800-756-9018 (in the USA) 
or 1-888-881-6611 (in Canada).
iThe SOS button is located above the in-
side rear view mirror.
The Roadside Assistance button• 
and the Information button¡ are 
located in the center storage compart-
ment (
page 201).
!The Tele Aid system utilizes the cellular 
network for communication and the 
GPS (G
lobal P
ositioning S
ystem) satel-
lites for vehicle location. If either of 
these signals are unavailable, the Tele 
Aid system may not function and if this 
occurs, assistance must be summoned 
by other means. 
316 Practical hintsWhat to do if ...Left display
Right display
Possible cause/ 
consequence
Possible solution
#
Visit
workshop
The battery is no longer charg-
ing. Possible causes:
alternator malfunctioning
broken poly-V-belt
Do not forget that the brake 
system requires electrical ener-
gy and may be operating with 
restricted capability. Consider-
ably greater brake pedal force 
is required and the pedal travel 
is longer. The stopping distance 
is increased.
Stop your vehicle immediately in a safe location and 
check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the engine will 
overheat due to an inoperative water pump which 
may result in damage to the engine. Notify an 
authorized Mercedes-Benz Center.
If it is in order:
Drive immediately to the nearest authorized 
Mercedes-Benz Center. Adjust driving to be consis-
tent with reduced braking responsiveness.
Read and observe messages in the multifunction display.
There is a malfunction in the 
electronic system.
Have the system checked at an authorized 
Mercedes-Benz Center immediately.