
136 UNDERSTANDING YOUR INSTRUMENT PANEL
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 button þ (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.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” is  u s ed  fo r
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): 

UNDERSTANDING YOUR INSTRUMENT PANEL 137
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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.Switching off preselected times:
Press the buttonH repeatedly until no memory is
displayed – no preselected time is activated.
Setting the Heating Period
Settings between 1 minute and 120 minutes may be set
for heating periods to run when the ignition is
switched off.
Do not switch on the heater.
Press the buttoný until the current heating period
begins to flash.
Use either the buttonýorþ to set the desired
heating period. The new heating period will be saved
as soon as the display disappears.
Auxiliary Heater Operation
The symbolö appears in the timer display as soon
as the heater is switched on. After about 20 to
50 seconds, the heater runs with the complete flow of
heat, so that the operating temperature is reached as
soon as possible. 

138 UNDERSTANDING YOUR INSTRUMENT PANEL
Heat operation:
Different operating conditions will be in effect
depending on the heat level required.
The integrated control unit adjusts the heat flow using
the following operating levels:
High – Low – Off
Safety Equipment
For safety reasons, the heater will automatically switch
off if faults occur which cause the device to overheat.
Tips for Coping with Problems; refer to "Auxiliary
Heater – Tips for Coping with Problems".
The integrated control unit contains a diagnostic
system which detects and stores faults. The error can
be read by means of the vehicle diagnosis. If a fault
occurs while the heater is switched on, the
symbolö will flash and the error code for that fault
will be displayed in the timer.
The fault should be corrected as soon as possible by an
authorized Sprinter Dealer.Settings with the Auxiliary Heater switched on
In preheat mode, the blower is automatically switched
on at blower speed 1 when the water heater is switched
on. When driving, the airflow control switch (2) can be
set as desired. 

UNDERSTANDING YOUR INSTRUMENT PANEL 139
4
NOTE: Only on vehicles with automatic heater
control/regulated air conditioner:
Before switching on the heater or entering the switch-
on time, the temperature control (1) must be set to
maximum heater output (as illustrated). 
Set the air distribution control (3) as required between
Y and Z.
AUXILIARY HEAT EXCHANGER IN LOAD 
COMPARTMENT, ONLY WITH AUXILIARY HEATER 
(OPTIONAL)
The auxiliary heat exchanger switch
is located on the right next to the
steering column.To 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. 

140 UNDERSTANDING YOUR INSTRUMENT PANEL
AUXILIARY HEATER – TIPS FOR COPING WITH 
PROBLEMS
NOTE: After three successive attempts to start the
heater, a malfunction will be recorded in the integrated
diagnostic system and no further operation on
auxiliary heater will be available (lock-out). The work
to annul the lock-out must be carried out at an
authorized Sprinter Dealer.
The heater either does not switch on or automatically 
switches off:
 Insufficient fuel, fill up the fuel tank. Start up heater
two 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.
Overheating
 The air channels are clogged.
The heater can be restarted once the fault has been
repaired. When this is done, the heater should be
switched on and off.
 The heater will remain switched off after it has been
overheated a number of times (about 10 times in
succession). Have the fault repaired by an
authorized Sprinter Dealer.
NOTE: Repairs should only be made by an authorized
Sprinter Dealer.