Page 296 of 509

295 Controls in detail
Useful features
lTele Aid*
The Tele Aid system
(Tele
matic Alarm Identification on De-
mand)
The Tele Aid system consists of three
types of response:
automatic and manual emergency
Roadside Assistance, and
informationThe Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and
telephone phone and GPS coverage are
available.
The speaker volume of a Tele Aid call can
be adjusted when using the volume control
on the multifunction steering wheel. To
raise, press buttonæ and to lower,
press buttonç or use the audio system
rotary control button (
page 189).
To activate, press the SOS button, the
Roadside Assistance button*b or
the Information button*}, depend-
ing on the type of response required.
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 initial activation of the Tele Aid system
may only be performed by completing the sub-
scriber agreement and placing an acquaintance
call using the Information button*}. Failure
to complete either of these steps will result in a
system that is not activated.
If you have any questions regarding activation,
please call the Response Center at
1-800-756-9018 (in the USA) or
1-888-923-8367 (in Canada).
iThe Tele Aid system utilizes the telephone
network for communication and the GPS (Global
Positioning System) satellites for vehicle loca-
tion. If either of these signals are unavailable, the
Tele Aid system may not function and if this oc-
curs, assistance must be summoned by other
means.
iThe SOS button, the Roadside Assistance
button*b, and the Information
button*} are located in the overhead con-
trol panel (
page 31).
Page 376 of 509

375 Practical hints
What to do if …?
ProblemPossible cause/consequenceSuggested solution
-The yellow Antilock
Brake System (ABS)
indicator lamp comes on
while the engine is
running.The charging voltage has fallen below
10 volts. The ABS has switched off. The
BAS, ESP
® and EBP are also switched off
(see messages in the multifunction display)
The battery may not be charged sufficiently.
Switch off electrical consumers that are
currently not needed, e.g. seat heat-
ing*.
If necessary, have the generator and
battery checked.
When the voltage is above this value again,
the ABS is operational again and the ABS in-
dicator lamp should go out.
-The yellow ABS indicator
lamp comes on while the
engine is running.The ABS is temporarily not available. The
ESP®, BAS and EBP are also unavailable.
The system’s self-diagnosis may not be
completed yet.
The brake system is still functioning nor-
mally but without the systems specified
above.
Drive a short distance with added
caution at a vehicle speed of above
12 mph (20 km/h).
When the ABS indicator lamp goes out,
the ABS, ESP
®, BAS and EBP are avail-
able again.
If the ABS indicator lamp does not go out:
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Failure to follow these instructions increas-
es the risk of an accident.
Page 390 of 509

389 Practical hints
What to do if …?
Text messages
Display Possible cause/consequencePossible solution
ABS and ESP
Currently Unavailable
See Operator’s ManualABS and ESP® are not available due to a malfunction.
BAS and the hill start assist are also switched off. It
is possible that the self-diagnostics have not yet
been completed.
The brake system still functions normally.Drive a short distance with gentle turns above a
speed of 12 mph (20 km/h).
The message disappears when ABS and ESP
®
are again available.
The ABS and ESP® were deactivated because of in-
sufficient power supply. The charging voltage has
fallen below 10 volts. BAS and the hill start assist are
also deactivated.
The brake system still functions normally but without
the ABS and ESP
® available.
When the voltage is above this value again, the ABS
and ESP® are operational again and the message in
the multifunction display should disappear.
If the message in the multifunction display does not
disappear:
Have the generator (alternator) and the battery
checked.
ABS and ESP
Inoperative
See Operator’s ManualABS and ESP® are switched off due to a malfunction.
BAS and the hill start assist are also switched off.
The brake system still functions normally but without
the ABS and ESP
® available.
Continue driving with added caution. Wheels
may lock during hard braking, reducing steering
capability.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases the
risk of an accident.
Page 398 of 509

397 Practical hints
What to do if …?
Symbol messages
Display Possible cause/consequencePossible solution
-ABS and ESP
Currently Unavailable
See Operator’s ManualABS and ESP® are not available due to a
malfunction. BAS and the hill start assist
are also switched off. It is possible that the
self-diagnostics have not yet been complet-
ed.
The brake system still functions normally.Drive a short distance with gentle turns
above a speed of 12 mph (20 km/h).
The message disappears when ABS and
ESP
® are again available.
The ABS and ESP® were deactivated be-
cause of insufficient power supply. The
charging voltage has fallen below 10 volts.
BAS and the hill start assist are also deacti-
vated.
The brake system still functions normally
but without the ABS and ESP
® available.
When the voltage is above this value again,
the ABS and ESP® are operational again and
the message in the multifunction display
should disappear.
If the message in the multifunction display
does not disappear:
Have the generator (alternator) and the
battery checked.