155 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Standard display
AMG
1
1AMG vehicles only.
AUDIO
NAV*
Distronic*
(page 157)
(page 157)
(page 161)
(page 163)
(page 163)
Commands/submenusDigital speedometer
Engine oil temperature
Selecting radio station
Show route guidance in-
structions, current direc-
tion traveled 
Calling up settings
Calling up maintenance 
system display
Vehicle supply voltage
Selecting satellite radio 
station*
RACETIMER
Operating CD player
Overall analysisLap analysis 
295 Controls in detail
Useful features
System self-check
Initially, after switching on the ignition, 
malfunctions 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 
Tele Aid malfunction 
Drive to workshop
 appears in the multi-
function 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 297) for instruc-
tions on initiating an emergency call man-
ually.
Once the emergency call is in progress, the 
indicator lamp in the SOS button will begin 
to flash. The message 
Connecting call
 
appears in the multifunction display and 
the audio system is muted. When the con-
nection is established, the message 
Call connected
 appears in the multifunc-
tion display. All information relevant to the 
emergency, such as the location of the ve-
hicle (determined by the GPS satellite loca-
tion system), vehicle model, identification 
number and color are generated.
i
The SOS button is located above the interior 
rear view mirror (
page 297).
The Roadside Assistance button• and the 
Information button¡ are located below the 
center armrest cover (page 285).
i
The Tele Aid system utilizes the cellular net-
work for communication and the GPS (G
lobal P
o-
sitioning S
ystem) satellites for vehicle location. 
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.
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 malfunction Drive to 
workshop
 is displayed in the multifunction 
display after the system self-check, a mal-
function in the system 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.