170Vehicle care● See the Owner's Manual forfurther information.
● Explosive gas may be present in the vicinity of the battery.
Additional battery Depending on the vehicle's auxiliary
equipment, certain models may have
an additional battery located under
the front passenger seat.
Notice
The additional battery is
automatically connected to the main vehicle battery only when the engine
is running. It does not need to be manually disconnected before
disconnecting the main vehicle
battery or before jump starting the
vehicle.
Jump starting 3 194.
Diesel fuel filter
The diesel fuel filter is accessible from the underside of the vehicle.
Drain filter of residual water at every
engine oil change.
Place a container underneath the
filter housing. Loosen the knurled screw on the lower part of the filter by
approx. one turn, to drain off the
water.
The filter is drained as soon as water- free diesel fuel emerges. Retighten
the screw.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system bleeding
If the fuel tank has been run dry, it will be necessary to air vent or bleed the
diesel fuel system.
Refuel then proceed as follows:
With ignition key
● Switch on the ignition (key to position 2) for five seconds at a
time.
● Switch off ignition (key to position
1 ) for three seconds.
Vehicle care181No.Circuit1Battery backup (with electronic
key system)2Adaptations3Adaptations4Vehicle battery (with electronic key system)5Additional heating and ventila‐
tion / Air conditioning system6Supplementary heating and
ventilation system7Electric exterior mirrors / Addi‐
tional adaptations8Heated exterior mirrors9Radio / Multimedia / Electric
exterior mirrors / Diagnostic
socket10Multimedia / Trailer hitch11Courtesy lights / Battery
discharge protectionNo.Circuit12Right-hand high beam / Left-
hand low beam / Sidelights /
Right-hand daytime running
light13Hazard warning flashers / Turn
and lane-change signals14Central locking15Left-hand high beam / Right-
hand low beam / Tail lights /
Left-hand daytime running light16Front fog lights / Rear fog lights /
Number plate lighting17Alarm / Horn / Lighting / Wiper18Instrument cluster19Heating and ventilation system20Rear window wiper / Wind‐
screen washer pump / Horn21General battery22Reversing lights23Brake switchNo.Circuit24Fuel injection / Starter25Airbag / Steering column lock26Passenger power window27Power steering28Brake lights29Battery backup (with electronic
key system)30Service display31Cigarette lighter / Power outlet32Heating and ventilation system33Brake lights / ABS / Immobiliser34Interior lighting / Air conditioning35Starting with electronic key
system36Rear window wiper37Warning chimes38Load compartment power outlet39Driver power window
