Page 152 of 498
151 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Standard display
AUDIO
NAV*
Distronic*
Vehicle status mes-
sage memory
1
1The vehicle status message memory menu is only displayed if there is a message stored.(page 153)
(page 153)
(page 155)
(page 155)
(page 156)
Commands/submenusDigital speedometer
Select radio station
Show route guidance 
instructions, current 
direction traveled
Call up settings
Call up vehicle malfunc-
tion, warning and system 
status messages stored 
in memory
Call up maintenance 
system display
Select satellite radio 
station*
Checking tire inflation 
pressure
Operate CD player
Check engine oil level 
     
        
        Page 263 of 498

262 Controls in detailUseful featuresThe 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 COMAND System or on the multi-
function steering wheel. To raise, turn the 
rotary volume control on COMAND System 
clockwise or press buttonæ on the 
multifunction steering wheel. To lower, 
turn the rotary volume control on 
COMAND System control counterclock-
wise or press buttonç on the multi-
function steering wheel. 
To activate, press the SOS button, the 
Roadside Assistance button• or 
the Information button¡, depend-
ing on the type of response required.iThe SOS button is located in the over-
head control panel (
page 264).
The Roadside Assistance button• 
and the Information button¡ are 
located below the center armrest cover 
(
page 252).
!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 sum-
moned by other means. 
     
        
        Page 264 of 498

263 Controls in detail
Useful features
System self-check
Initially, after switching on ignition, mal-
functions are detected and indicated (the 
indicator lamps in the SOS button, the 
Roadside Assistance button• and the 
Information button¡ stay on longer 
than 10 seconds or do not come on). The 
message 
Malfunction. Drive to work-
shop
 appears in the multifunction display.Emergency calls
An emergency call is initiated automatical-
ly following an accident in which the emer-
gency tensioning devices (ETDs) or 
air bags deploy.
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 (
page 264) for 
instructions on initiating an emergency call 
manually.
Once the emergency call is in progress, the 
indicator lamp on the SOS button will 
begin to flash. The message 
Connecting Call
 appears in the multifunc-
tion display. When the connection is estab-
lished, the message 
Call connected
 
appears in the multifunction display. All in-
formation relevant to the emergency, such 
as the location of the vehicle (determined 
by the GPS satellite location system), vehi-
cle model, identification number and color 
are generated.
iWhen a Tele Aid call has been initiated, 
the COMAND System audio is muted 
and the selected mode (radio, tape or 
CD) pauses. The optional cellular 
phone (if installed) and inserted in cra-
dle switches off. If you must use this 
phone, we recommend that you use it 
only with the vehicle at a standstill in a 
safe location. Remove the phone from 
the cradle and place the call. The navi-
gation* system (if engaged) will contin-
ue to run. The multifunction display in 
the instrument cluster is available for 
use, and spoken commands are only 
available by pressing the RPT button on 
the COMAND System. A pop-up win-
dow will appear in the COMAND Sys-
tem display to indicate that a Tele Aid 
call is in progress. After the Tele Aid 
call has ended, the optional cellular 
phone switches on again. A PIN entry 
might be necessary.
Warning!
G
If the indicator lamps on the SOS button, on 
the Roadside Assistance button, and/or on 
the Information button remain illuminated 
continuously in red and/or the message Malfunction. Drive to workshop
 is 
displayed in the multifunction display after 
the system self-check, a malfunction in the 
system has been detected.
If a malfunction is indicated as outlined 
above, the system may not operate as 
expected. Have the system checked at the 
nearest Mercedes-Benz Center as soon as 
possible. 
     
        
        Page 475 of 498

474 Technical termsFSS PLUS (Canada vehicles)
(F
lexible S
ervice S
ystem PLUS)
Maintenance service indicator in the 
multifunction display that informs the 
driver when the next vehicle mainte-
nance service is due. FSS evaluates 
engine temperature, oil level, vehicle 
speed, engine speed, distance driven 
and the time elapsed since your last 
service, calculates other maintenance 
service work required, and calls for the 
next maintenance service accordingly. 
GAWR
(G
ross A
xle W
eight R
ating)
(
page 332)
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 
receivers. Employs DVD digital maps 
for navigation.
GVW
(G
ross V
ehicle W
eight)
(
page 332)
GVWR
(Gross V
ehicle W
eight R
ating)
(
page 333)
Instrument cluster
The displays and indicator/warning 
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer 
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.
Kilopascal (kPa)
(
page 333)
Locking knob
Knob on the door which indicates 
whether the door is locked or un-
locked. Pushing the locking knob down 
on an individual door from inside will 
lock that door.