Page 99 of 272

UNDERSTANDING YOUR INSTRUMENT PANEL 99
4
Engine Control Unit Indicator LampWhen the key is in position 2 in the ignition lock, the
engine control unit indicator lamp± will light up in
the instrument cluster. It must go out when the engine
is running.If the engine control unit indicator lamp
±
remains on
or lights up again while the vehicle is moving, the fuel tank
was run empty or a fault has developed in the engine
control unit. The engine’s power output may be reduced.
Refuel and bleed the fuel system or have the cause
traced and rectified by an authorized Sprinter Dealer.
Indicator Lamp Symbolsv
Acceleration skid control (ASR), or electronic
stability program (ESP),
or slippery surface warning.
1
Airbag malfunction (USA only).
A
High beam on.
#
Battery not being charged.
Water in fuel filter.
2
Brake pads worn.
ù
Engine oil level too low.
/
Coolant level too low.
;
Brake fluid level too low and electronic brake
force distribution (EBV) malfunction (USA only)
.
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Page 123 of 272

UNDERSTANDING YOUR INSTRUMENT PANEL 123
4
AUXILIARY HEATER – WATER OR AIR HEATER
(OPTIONA L)
NOTE: The auxiliary heater (water or air heating
device) can be used whether or not the engine is
running.
The auxiliary heater should be run at least once a
month for about 10 minutes.
The maximum heating period is 120 minutes. For more
information, refer to "Switching the Auxiliary Heater
On and Off - Ignition On".
The auxiliary heater will automatically switch off if the
fuel level is under about 4 US gal (15 l).
In case of faults, refer to "Auxiliary Heater – Tips for
Coping with Problems".
WARNING!
The auxiliary heating must not be operated at gas
stations due to the risk of fire and explosion. For
this reason, switch off the auxiliary heating before
refuelling.
Auxiliary heaters emit fumes when in operation,
including carbon monoxide.
Inhaling carbon monoxide is a health hazard and
can result in unconsciousness and death.
For this reason, do not operate auxiliary heating in
enclosed spaces without ventilation or an
extractor system, e.g. in a garage. Otherwise you
could endanger yourself and others.
WARNING!
Vehicles for transporting hazardous goods:
Observe the relevant safety regulations.
Freightliner-all.book Pag e 123 Monday, December 1, 2003 2:54 PM
Page 130 of 272

130 UNDERSTANDING YOUR INSTRUMENT PANELTo switch on at blower speed 1:
Press the upper section, the left-hand indicator lamp in
the switch lights up.
To switch on at blower speed 2:
Press the lower section, the right-hand indicator lamp
in the switch lights up.
To switch off :
Press the switch to the middle position.
Operation is only possible when the key is turned to
position 2 in the ignition lock.
NOTE: The auxiliary heat exchanger in the load
compartment should be switched off at coolant
temperatures below 176 °F (+80 °C) to quickly de-fog
and de-ice the windshield and front side windows.
A UXILIA RY HEA TER – TIPS FOR COPING WITH
PROBLEMSThe heater either does not switch on or automatically
switches off:
Insufficient fuel, fill up the fuel tank. Start up heater
several times, until the fuel lines are filled.
The auxiliary heater will automatically switch off if
the fuel level is under about 4 US gal (15 l).
The fuses in the fuse box are damaged. Electric
fuses.
The battery voltage is too low, an undervoltage
protector switches off the heater if the battery
voltage falls below about 10 volts.
The heater motor does not run
The battery voltage is too low, check the battery.
Batteries.
The fuses in the fuse box are damaged.
Electric fuses.
The heater motor is damaged.
Freightliner-all.book Pag e 130 Monday, December 1, 2003 2:54 PM
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