Page 129 of 442

129 Controls in detail
Control system
Control system
The control system is activated as soon as 
the SmartKey in the starter switch is 
turned to position1 or as soon as the 
KEYLESS-GO start/stop button* is in 
position1. The control system enables you 
to:
call up information about your vehicle
change vehicle settings.
For example, you can use the control sys-
tem to find out when your vehicle is next 
due for service, to set the language for 
messages in the instrument cluster dis-
play, and much more.
The control system relays information to 
the multifunction display.
Multifunction display
1Segment ring
2Standard display
3Trip odometer
iThe displays for the audio systems (ra-
dio, CD player) will appear in English, 
regardless of the language selected.
Warning!
G
A driver’s attention to the road and traffic 
conditions must always be his / her primary 
focus when driving.
For your safety and the safety of others, se-
lecting features through the multifunction 
steering wheel should only be done by the 
driver when traffic and road conditions per-
mit it to be done safely.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km / h), your vehicle is 
covering a distance of 44 feet (approximate-
ly 13.5 m) every second. 
     
        
        Page 332 of 442
332 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
G
Display malfunction
The instrument cluster display is malfunc-
tioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Display malfunction 
Visit workshop! 
The displays for several systems have 
malfunctioned. Some systems them-
selves may also have malfunctioned.
Have the electronic systems checked 
by an authorized Mercedes-Benz Cen-
ter.
± 
Display malfunction
Visit workshop!
Certain electronic systems are unable to 
relay information to the control system. 
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked 
by an authorized Mercedes-Benz Cen-
ter.
J
 
Door open
You are attempting to drive with one or 
more doors open.
Close the doors. 
     
        
        Page 413 of 442

413 Technical terms
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 DVD digital maps for 
navigation.
Instrument cluster
The displays and indicator/warning 
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer 
and fuel gauge.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 exterior mirror posi-
tions for each SmartKey.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 
ANTI-KNOCK INDEX.