143 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 
position 1. The control system enables 
you to
call up information about your vehicle 
change vehicle settings 
For example, you can use the control 
system to find out when your vehicle is 
next due for service, to set the language 
for messages in the instrument cluster 
display, and much more.
The control system relays information to 
the multifunction display.
Multifunction display
The multifunction display consists of the 
display fields in the speedometer and the 
tachometer. In its default state, the left 
multifunction display shows the main 
odometer and the outside temperature, 
while the trip odometer appears in the 
right multifunction display. This default 
setting is referred to as the standard 
display.
1Main odometer
2Outside temperature
3Current gear selector lever position
4Trip odometer
5Automatic transmission program mode 
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, 
selecting features through the multifunction 
steering wheel should only be done by the 
driver when traffic and road conditions 
permit 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 
(approximately 14 m) every second. 
386 Practical hints
What to do if …
Left displayRight displayPossible cause/consequencePossible solution
2You are attempting to drive with 
one or more doors open.Close the doors.
Vehicles with KEYLESS-GO*:
You are pressing the lock button on 
the door handle and at least one 
door is open.
±Service
RequiredCertain electronic systems are 
unable to relay information to the 
control system. The following 
systems may have failed:
Coolant temperature gauge
Tachometer
Have the electronic systems checked by an 
authorized Mercedes-Benz Center 
(
page 346).
_ Entry Position
Do Not DriveThe steering wheel has not yet 
moved into its stored driving posi-
tion.Wait until the steering wheel has moved to its 
driving position.
The message disappears.