Page 151 of 424

148 Flexible service system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
The service indicator disappears automatically after 
30 seconds or if button  Jon the instrument cluster 
is pressed.
Calling up service indicator manually:
Turn the electronic key in starter switch to position 1.
Call up the trip odometer and main odometer by 
pressing buttonè orÿ on the multifunction 
steering wheel until the display appears. See page 124.
Press buttonj ork until the FSS indicator 
appears.
The next or previous system is displayed by pressing 
buttonè orÿ.
Important!
The FSS indicator is not an engine oil level indicator. 
See page 154 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. 
         
        
        
     
        
        Page 152 of 424

149 Flexible service system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Following a completed A or B service the Mercedes-Benz 
Center sets the counter mileage to 10 000 miles 
(Canada: 15 000 km) and 365 days.
The counter can also be set by any individual. To do so:
Turn the electronic key in starter switch to position 1.
To call up the trip odometer and main odometer, press 
buttonè orÿ on the multifunction steering 
wheel until the display appears. See page 124.
Press buttonj ork until the FSS indicator 
appears.
Press button  Jon the instrument cluster for 
approximately 2 seconds.The multifunction display will show the question: 
“DO YOU WANT TO RESET SERVICE INTERVAL? – 
CONFIRM BY PRESSING R”
Press button  Jon the instrument cluster again to 
reset the service indicator.
The new service indicator is displayed with the reset 
distance of 10 000 miles (Canada 15 000 km).
If the FSS counter was inadvertently reset, have a 
Mercedes-Benz Center correct it.
However you choose to set your reference numbers, the 
scheduled services as posted in the Service Booklet 
must be followed to properly care for your vehicle. 
         
        
        
     
        
        Page 153 of 424

150 Tire inflation pressure monitor
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Tire inflation pressure monitor
The tire inflation pressure, as selected by the driver, is 
monitored in all four wheels on the ground. A warning 
is issued to the driver in the case of a decrease in the 
inflation pressure in one or more of the tires.Inquiry of present tire inflation pressure
Turn electronic key in starter switch to position 1 or 2.
Pressè or ÿbutton on the multifunction 
steering wheel until the display for trip and main 
odometer appears, see page 124.
Press thej or kbutton repeatedly until the tire 
inflation pressure monitor is displayed.
The present tire inflation pressure for each wheel is 
displayed in multifunction display.
Wa r n i n g !
The tire inflation pressure monitor does not 
indicate a warning for wrongly selected inflation 
pressures. Always adjust tire inflation pressure 
according to the label affixed on the fuel filler flap. 
See page 345 for tire inflation pressure.The tire inflation pressure monitor is not able to 
issue a warning due to a sudden loss of pressure 
(e.g. tire puncture caused by a foreign object). In 
this case bring vehicle to a halt by carefully 
applying the service brakes and avoiding abrupt 
steering maneuvers. 
         
        
        
     
        
        Page 154 of 424

151 Tire inflation pressure monitor
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Notes:
Following a tire inflation pressure reactivation process 
the real tire inflation pressures are displayed only after 
a few minutes travel time.
Possible differences between readings of a tire pressure 
gauge of an air hose, e.g. gas station equipment, and the 
vehicle’s multifunction display can occur. The vehicle’s 
multifunction display of the tire inflation pressure 
monitor is a more precise reading.Activation of tire inflation pressure monitor
Activation of tire inflation pressure monitor is 
necessary if tire inf lation pressure is being changed, 
wheels or tires are replaced, or new wheels are installed 
on the vehicle. 
Tire inf lation pressure should be checked and corrected 
according to the label affixed inside the fuel filler flap. 
For a detailed description, refer to page 345.
Turn electronic key in starter switch to position 2 (the 
engine must not be running).
Notes:
When checking the tire inflation pressure of the road 
wheels, also check the spare tire. 
The tire inflation pressure of the spare wheel, mounted 
or not mounted, is not monitored by the tire inflation 
pressure monitor.
See page 335 for location of the spare wheel, and 
page 345 for tire inflation pressure. 
         
        
        
     
        
        Page 157 of 424

154 Engine oil level indicator
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Engine oil level indicator
To check the engine oil level, park vehicle on level 
ground, with engine at normal operational temperature.
Check oil level approximately 5 minutes after stopping 
the engine, allowing for the oil to return to the oil pan.
The message “PERF. SERV. ON TIME” (perform service 
[engine oil level check] on time) will be displayed if the 
required waiting period has not been observed after 
stopping the engine:
•with engine at operational temperature approx. 
5minutes.•with engine not at operational temperature up to 
approx. 30 minutes.
The engine oil level check can be repeated after a short 
time.
Turn the electronic key in starter switch to position 2.
To call up the trip odometer and main odometer, press 
buttonè orÿ on the multifunction steering 
wheel until the display appears. See page 124. 
Press buttonj ork on the multifunction 
steering wheel repeatedly until the “WHEN 
MEASURING – CAR MUST BE LEVEL” engine oil level 
indicator appears. This indicator is only a reminder. 
Measurement can be cancelled by pressing buttonj 
ork if the vehicle is not parked on level ground. An 
incorrect reading will be recorded if you do not cancel 
the measurement. Move the vehicle to level ground and 
measure again.
The electronic key in starter switch is not in position 2 if 
the “ENGINE OIL LEVEL – SWITCH ON IGNITION” 
message appears.
The “ENGINE OIL LEVEL – MEASURING NOW” 
message is displayed after approximately 3 seconds. 
         
        
        
     
        
        Page 159 of 424

156 Exterior lamp switch
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Exterior lamp switch
MOff
UAutomatic headlamp mode, see below.
CParking lamps (also side marker lamps, taillamps, 
licence plate lamps, instrument panel lamps) 
Canada only: When the engine is running, the low 
beam is additionally switched on.
BParking lamps plus low beam or high beam 
headlamps (combination switch pushed forward).ˆStanding lamps, right (turn left one stop)
‚Standing lamps, left (turn left two stops)
‡Front fog lamps (pull out one stop) with parking 
lamps and/or low beam headlamps on. Green 
indicator in lamp switch comes on.
†Rear fog lamp (pull out to second detent) in 
addition to the front fog lamps. Yellow indicator in 
lamp switch comes on.
Note:
With the electronic key removed and the driver’s door 
open, a warning sounds if the vehicle’s exterior lamps 
(except standing lamps) are not switched off.
Fog lamps will operate with the parking lamps and/or 
the low beam headlamps on. Fog lamps should only be 
used in conjunction with low beam headlamps. Consult 
your State or Province Motor Vehicle Regulations 
regarding allowable lamp operation.
Fog lamps are automatically switched off when the 
exterior lamp switch is turned to position M or U.
P54.25-2390-26 
         
        
        
     
        
        Page 160 of 424

157 Exterior lamp switch
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Headlamp mode (HEADLAMPS)
(USA only)
The headlamps can be switched on and off manually or 
automatically, or switched to daytime running lamp 
mode.
Manual operation:
The low beam headlamps, parking lamps and license 
plate lamps can be switched on and off with the exterior 
lamp switch. For exterior lamp switch, see above.Automatic operation:
With electronic key in starter switch in position 1 turn 
exterior lamp switch to positionU.
The parking lamps switch on and off automatically 
depending on the brightness of the ambient light.
With the engine running and exterior lamp switch in 
positionU:
The low beam headlamps, parking lamps and license 
plate lamps are switched on and off automatically 
depending on the brightness of the ambient light. 
The low beam headlamps, parking lamps and license 
plate lamps can still be switched on and off manually 
using the exterior lamp switch.
Note:
The headlamps will not be automatically switched on 
under foggy conditions.
Wa r n i n g !
The driver is responsible for the operation of the 
vehicle’s lights at all times. The automatic 
headlamp feature is only an aid to the driver. 
Switch on the vehicle lights by hand when driving 
or traffic conditions require you to do so. 
         
        
        
     
        
        Page 161 of 424

158 Exterior lamp switch
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Daytime running lamp mode
Turn exterior lamp switch to positionM.
When the engine is running, the low beam headlamps 
(includes parking lamps and license plate lamps) are 
automatically switched on.
Canada only:
When shifting from a driving position to position “N” 
or “P”, the low beam switches off (3 minutes delay).
For nighttime driving the exterior lamp switch should 
be turned to positionB to permit activation of the 
high beam headlamps.
USA only:
The high beam headlamps can also be activated when 
driving with the daytime running lamp mode activated 
and exterior lamp switch in positionM.
See page 156 for notes on the exterior lamp switch.
To activate the daytime running lamp mode, see 
“Individual settings” – “LIGHTING” on page 142.Night security illumination
When turning off the engine, the exterior lamps switch 
on for added illumination, if they were previously 
switched on (except in daytime running mode). After 
the last door has been closed the lamp-on time period 
commences.
The lamp-on time period for night security illumination 
can be set at several different timed levels from 0 (off) to 
60 seconds.
Notes:
Within 10 minutes after closing the last door the night 
security illumination can be reactivated by opening a 
door.
See “Individual settings” – “LIGHTING” on page 142 for 
instructions on how to activate the function. 
Deactivating night security illumination temporarily:
Turn the electronic key in starter switch to position 0 
then to position 2 and back to position 0 again before 
getting out of the vehicle. The night security 
illumination will not be activated when the door is 
opened.