Page 137 of 288

UNDERSTANDING YOUR INSTRUMENT PANEL 137
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.
Page 138 of 288

138 UNDERSTANDING YOUR INSTRUMENT PANELAUXILIARY HEATER – TIPS FOR COPING WITH
PROBLEMSNOTE: 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.
Page 168 of 288

168 STARTING AND OPERATINGDeactivating the Acceleration Skid Control (ASR)See Section 4, Understanding Your Instrument Panel,
for switch locations. When driving with snow chains, in
deep snow, or on sand or gravel, it
can be beneficial to deactivate the
acceleration skid control (ASR).
The engine ’s torque is then no longer
limited and the drive wheels are free
to spin, which can help them cut into
loose surfaces.
The ASR can only be shut off with the engine running.
If the engine is shut off with the ASR deactivated, the
ASR is automatically re-activated after the engine is
started again. Vehicle Type 2500 only:
If there is a danger of skidding, and/or starting at a
speed of 38 mph (60 km/h) ESP activates ASR
automatically.
WARNING!
On a slippery road surface if both drive wheels
start to spin there is a risk of skidding. Adapt your
speed and driving style to the prevailing road,
traffic and weather conditions.
P54.25-0294-20
WARNING!
Vehicle type 2500 only:
Even when ASR is deactivated, ESP remains
active and regulates braking to improve stability
as necessary. The warning lamp
v flashes in
the speedometer.
The danger of your vehicle’s brake system
overheating and being damaged is increased
during long, demanding application of the
brakes. Furthermore, an overheated brake system
could result in a longer stopping distance.
Thus, only deactivate ASR if it is absolutely
necessary.