139 Flexible service system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index The next service due date is displayed either in days or 
in miles, depending on your driving style.
Once the suggested service term has passed, the symbol 
and message appear for approximately 30 seconds and 
a signal sounds every time when turning the electronic 
key in starter switch to position 2.
The service indicator disappears automatically after 
30 seconds or if the knob for instrument cluster 
illumination, see page 96, in the instrument cluster is 
pressed.
Calling up service indicator manually:
Turn the electronic key in starter switch to position 1 
or 2.
Call up the trip odometer and main odometer by 
pressing button è or ÿ on the multifunction 
steering wheel until the display appears. See page 106.
Press button j or k until the FSS indicator 
appears.
The next or previous system is displayed by pressing 
button è or ÿ.Important!
The FSS indicator is not an engine oil level indicator. 
See page 141 for engine oil level indicator.
Note:
When disconnecting vehicle battery for one or more 
days at a time, such days will not be counted. Any such 
days not counted by the FSS can be added by your 
Mercedes-Benz Center. 
The interval between services is determined by the type 
of driving for which the vehicle is used. For example, 
driving at extreme speeds, and cold starts combined 
with short distance driving in which the engine does not 
reach operating normal temperature, reduce the interval 
between services.