31 Getting started
Unlocking
Starter switch positionsStarter switch0For removing key
The steering is locked when the key is 
removed from the starter switch. If 
necessary, move steering wheel slight-
ly to allow the locking mechanism to 
engage.
1Power supply to some electrical 
consumers, such as seat adjustment
2Ignition (power supply for all electrical 
consumers) and driving position
3Starting position
Warning!
G
When leaving the vehicle, always remove the 
SmartKey from the starter switch and lock 
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. Unsupervised use of vehicle 
equipment may cause an accident and/or 
serious personal injury.iVehicles with automatic transmission: 
The SmartKey can only be removed 
from the starter switch with the gear 
selector lever in positionP.
!If the key is left in starter switch 
position0 for an extended period of 
time, it can no longer be turned in the 
starter switch.
Remove the key from the starter 
switch and reinsert.
If the key can still not be turned, the 
battery may not be sufficiently 
charged.
Check the battery and charge it if 
necessary (
page 240).
Get a jump start (
page 306).
To prevent accelerated battery dis-
charge and a possible dead battery, al-
ways remove the key from the starter 
switch. 
248 OperationMaintenanceCalling up the service indicator
Switch ignition on.
The standard display of the control sys-
tem appears (
page 116).
Press button
k
 or
j
 on the mul-
tifunction steering wheel until the FSS 
indicator appears in the multifunction 
display.
Resetting the service indicator 
In the event that the service on your vehi-
cle is not carried out by an authorized 
Mercedes-Benz Center, you can reset the 
service indicator yourself.
Switch ignition on.
The standard display of the control sys-
tem appears (
page 116).
Press button
k
 or
j
 on the mul-
tifunction steering wheel until the FSS 
indicator appears in the multifunction 
display.
Press the reset knob for about four 
seconds.
This message appears in the tachome-
ter:DO YOU WANT TO RESET SERVICE INTER-
VAL? CONFIRM BY PRESSING RESET (R) 
BUTTON
To confirm, hold down the reset knob 
until you hear a signal.The service indicator now displays the 
reset interval.
iIf the battery is disconnected, the days 
of disconnection will not be included in 
the count shown by the service indica-
tor. To arrive at the true service dead-
line, you will need to subtract these 
days from the days shown in the ser-
vice indicator.
Do not confuse the service indicator 
with the engine oil level indicator
:
.
iIf the service indicator was inadvertent-
ly reset, have a Mercedes-Benz Center 
correct it.
Only reset if the proper service has 
been performed. Resetting the system 
without performing proper service as 
called for by the FSS will cause the FSS 
to incorrectly determine the next 
service interval which will result in 
engine damage not covered by the 
Mercedes-Benz Limited Warranty.