238 Controls in detailUseful featuresSystem self-check
Initially, after turning the SmartKey in 
starter switch to position2, malfunctions 
are detected and indicated (the indicator 
lamps in the SOS button, the Roadside As-
sistance button
•
 and the Information 
button
¡
 stay on longer than 
10 seconds or do not come on). The mes-
sage 
TELE AID – VISIT WORKSHOP!
 ap-
pears for approximately 10 seconds in the 
multifunction display.Emergency calls
An emergency call is initiated automatical-
ly:
Following an accident in which the 
emergency tensioning devices (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 82) and tow-away alarm 
(
page 84)
An emergency call can also be initiated 
manually by opening the cover next to the 
inside rear view mirror labeled SOS, then 
briefly pressing the button located under 
the cover. See below for instructions on 
initiating an emergency call manually.
iThe Tele Aid system utilizes the cellular 
network for communication and the 
GPS (Global Positioning System) 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.
Warning!
G
If the indicator lamps in the SOS button, in 
the Roadside Assistance button and/or in 
the Information button remain illuminated 
constantly in red and/or the message TELE AID – VISIT WORKSHOP! 
is dis-
played in the multifunction display after the 
system self-check, a malfunction in the sys-
tem has been detected.
If a malfunction is indicated as outlined 
above, the system may not operate as ex-
pected. Have the system checked at the 
nearest Mercedes-Benz Center as soon as 
possible. 
383 Technical terms
FSS
(F
lexible S
ervice S
ystem)
Service indicator in the multifunction 
display that informs the driver when 
the next vehicle maintenance service is 
due.
Gear range
Number of gears which are available to 
the automatic transmission for shifting. 
The automatic gear shifting process 
can be adapted to specific operating 
conditions using the selector lever.
GPS
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying 
geographic location information to and 
from vehicles equipped with special re-
ceivers. Employs CD digital maps for 
navigation.
Instrument cluster
The displays and indicator/warning 
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer, 
engine temperature and fuel gauge.KEYLESS-GO*
System for entering and operating the 
vehicle without the use of a SmartKey.
Kickdown
Depressing the accelerator past the 
point of resistance shifts the transmis-
sion down to the lowest possible gear. 
This very quickly accelerates the vehi-
cle and should not be used for normal 
acceleration needs.
Lock button
Button on the door which indicates 
whether the door is locked or un-
locked. Pushing the lock button down 
on an individual door from inside will 
lock that door.
Memory function*
Used to store three individual seat, 
steering wheel and mirror positions for 
each SmartKey or, if so equipped, KEY-
LESS-GO* card.Menu
The control system displays are ar-
ranged in menus. Each menu contains 
a number of commands for particular 
systems. In the Audio menu, for exam-
ple, you will find the commands 
Select 
radio station 
or Operate CD player
. 
Using commands, you can directly 
change the settings for your vehicle.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline 
as determined by a standardized meth-
od. It is an indication of a gasoline's 
ability to resist undesired detonation 
(knocking). The average of both the 
MON (Motor Octane Number) and 
->RON (Research Octane Number) is 
posted at the pump, also known as AN-
TI-KNOCK INDEX.
Multifunction display
Display field in the speedometer used 
to present information provided by the 
control system.