Page 112 of 272
112 UNDERSTANDING YOUR INSTRUMENT PANELDe-Fogging and De-Icing The Front Windows1. Set the airflow control (2) to position 3 or 4.
2. Set the temperature control (1)
to P.
3. Set the air distribution control (3) to Z.
4. Switch off air recirculation, refer to "Air
Recirculation".NOTE: On vehicles with auxiliary heater (water
heater):
The additional heat exchanger in the load
compartment should be switched off to quickly de-fog
and de-ice the windshield and front side windows,
refer to "Auxiliary Heat Exchanger in Load
Compartment".
For how to switch on heater booster mode, refer to
"Heater Booster".
On vehicles with air conditioner (Optional):
At outside temperatures above 41 °F (+5 °C), switch on
the air conditioner for quicker dehumidification, refer
to "Air Conditioning, Regulated".Freightliner-all.book Pag e 112 Monday, December 1, 2003 2:54 PM
Page 114 of 272
114 UNDERSTANDING YOUR INSTRUMENT PANELHeated Rear Window (Optional)
The switch for the heated rear
window is located on the right-hand
side next to the steering column.
It can be used only when the engine
is running.
To switch it on:
Press upward; the indicator lamp in the switch will
light up.
To switch off:
Press upward one more time.
NOTE: The heated rear window will automatically
switch off after about 15 minutes or when the engine is
turned off.
Windshield Heater (Optional)
The switch for the windshield heater
is located on the center section of the
dashboard.
It can be used only when the engine
is running.
To switch it on:
Press upward; the indicator lamp in the switch will
light up.
To switch off:
Press upward one more time.
NOTE: The windshield heater will automatically
switch off after about 5 minutes or when the engine is
turned off.
Freightliner-all.book Pag e 114 Monday, December 1, 2003 2:54 PM
Page 122 of 272

122 UNDERSTANDING YOUR INSTRUMENT PANELHEA TER BOOSTER
The switch (1) for activating the
heater booster system is located in
the center section of the dashboard.
The heater booster system can be
switched on while the vehicle is
being driven to help the engine to
reach its normal operating
temperature more quickly, which
will help to heat up the passenger compartment as
quickly as possible when the heating is switched on.To switch on with the engine running:
Press switch (1), the indicator lamp (2) lights up.
To switch off:
Press switch (1) again or switch the engine off. The
heater booster will then switch to run-on mode (about
2minutes).
NOTE: When the vehicle is being driven and a coolant
temperature of over 185 °F (+80 °C) is reached, the
heater booster system will switch to regulation mode.
If the coolant temperature drops to below 167 °F
(+75 °C) with the heater booster system switched on,
heat output is increased again.
If the key is turned to position 0 in the ignition lock
(run-on for about 2 minutes), the last setting selected at
switch (1) is retained when the engine is restarted
(memory function).
The operation of the heater booster system is usually
not required at outside temperatures above 41 °F
(+5 °C).
Freightliner-all.book Pag e 122 Monday, December 1, 2003 2:54 PM
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 124 of 272

124 UNDERSTANDING YOUR INSTRUMENT PANEL
A uxiliary Heater Switch
(Water Heater only)
To switch it on:
Press the switch upward.
The indicator lamp in the switch will
light up.
The auxiliary heater will
automatically switch off after about
120 minutes. The auxiliary heater
will switch over to after-running mode (about
2minutes).
To switch off:
Press the switch downward.
The indicator lamp in the switch will go out.
WARNING!
Aerosals, gas cartridges and other pressurized
containers transported in the vehicle may be high-
ly flammable and could explode when heated.
Make sure, particularly on vehicles with an air
heater, that such containers are not placed in the
flow of hot air of the auxiliary heating system
Otherwise there is a risk of severe personal
injuries, death and property damage due to
explosion.
WARNING!
Vehicles with air heater:
For safety reasons, we strongly recommend that
the heat exchanger be replaced by an authorized
Sprinter Dealer after 10 years of use.
If the vehicle is sold, the owner is required to
inform the buyer of this requirement. This should
be done when the Operator’s Manual is
transferred to the buyer.
Freightliner-all.book Pag e 124 Monday, December 1, 2003 2:54 PM
Page 125 of 272

UNDERSTANDING YOUR INSTRUMENT PANEL 125
4
Timer A uxiliary Heater (Water and A ir Heater)NOTE: The timer water heater has no adjustable
temperature selection transformer (10).
1. Memory location (1 – 3)
2. Current day or preselected day
3. Current time or preselected time
4. Symbolö – Status display
5. Button ” – Set time and day 6. ButtonH – Select memory (1 – 3), activate
preselected time
7. Buttonö – Switch on heater
8. Buttoný – Set time, day, and preselected time;
shorten heating period (min. 1 minute)
9. Buttonþ – Set time, day, and preselected time;
lengthen heating period (max. 120 minutes)
10. Air Heater only, adjustable temperature selection
transformer – adjustment range from 50 °F to 86 °F
(+10 °C to +30 °C)
NOTE: All symbols and digits in the display will flash
if the battery voltage has been interrupted over a
longer period of time. The timer must be reset.
The heater cannot be switched on until the time of day
has been set.
The timer lights up when the heater is switched on.Freightliner-all.book Pag e 125 Monday, December 1, 2003 2:54 PM
Page 126 of 272

126 UNDERSTANDING YOUR INSTRUMENT PANELSwitching the Auxiliary Heater On and Off - Ignition
Off
To switch it on:
Press buttonö.
The vehicle-side blower automatically switches on.
Display: Symbolö and remaining heating period.
The remaining heating period can be lengthened by
using the buttonþ (max. of 120 minutes); it may be
shortened by using the buttoný (min. of 1 minute).
To switch off:
Press buttonö again.
The blower inside the vehicle automatically switches
off. The auxiliary heater will automatically switch off
after about 3 minutes.
Display: Current time and current day of the week
(about 15 seconds).
Switching the Auxiliary Heater On and Off - Ignition
On
To switch it on:
Press the buttonö.The auxiliary heater is running.
Display: Symbolö, current time and current day of
the week.
If the ignition is switched off, the auxiliary heater will
remain on for another 15 minutes before automatically
switching off. The remaining heating period can be
lengthened by using the buttonþ (max. of
120 minutes); it may be shortened by using the
buttoný (min. of 1 minute).
To switch off:
Press the buttonö again.
The auxiliary heater will automatically switch off after
about 3 minutes.
Display: Current time and current day of the week.
Setting the time and day
Press the button” until the "Time" display begins to
flash.
Use either the buttonýorþ to set the current
time. The current time has been saved when the
display stops flashing or the button” is used for
confirmation.Freightliner-all.book Pag e 126 Monday, December 1, 2003 2:54 PM
Page 127 of 272

UNDERSTANDING YOUR INSTRUMENT PANEL 127
4
The "Day" display then flashes.
Use either the buttonýorþ to set the current
day of the week. The current day has been saved when
the display stops flashing or the button” i s u se d f or
confirmation.
When the ignition is switched on, the current time and
day remain on display. When the ignition is switched
off, the display disappears after about 15 seconds.
Setting/Activating Preselected Times
3 preselected times may be saved.
Setting preselected times:
Press the buttonH repeatedly until the desired
memory (1 – 3) flashes.
Briefly press the buttonýorþ – the preselected
time will flash.
Use either the buttonýorþ to set the
preselected time. The current preselected time has
been saved when the display stops flashing.
Activate the preselected time (up to 24 hours):Press the buttonH until the desired memory (1 – 3)
and the preselected time both flash.
The preselected time has been activated when the
display stops flashing. Within the next 24 hours, the
heater will switch on at the preselected time displayed.
Activate the preselected time (from 24 hours to a max.
of 7 days):
A preselected time may be chosen up to 7 days
beforehand.
Press the buttonH until the desired memory (1 – 3)
and the preselected time both flash.
After about 5 seconds, the "Preselected Day" display
will appear – use either the buttonýorþ to set
the preselected day.
The preselected time and day have been activated
when the display stops flashing and when the current
time, activated memory, and the flashing symbolö
appear in the display.
To call up the activated memory:
Briefly press the buttonH – the preselected day and
time will be displayed for about 5 seconds.Freightliner-all.book Pag e 127 Monday, December 1, 2003 2:54 PM