Mercedes-Benz Sprinter Operating Instructions Manual page 125

auxiliary heating system and the heater boos-
ter function switch off automatically.
Heating time
The heating time when operating the auxiliary
heating with the vehicle is stationary without
the engine running depends on the outside
temperature and the electrical consumers
switched on.
Outside Heating
tempera- time
ture
Above Approx.
23 ‡ 20 minutes
(Ò5 †)
23 ‡ Approx.
(Ò5 †) to 40 minutes
5 ‡
(Ò15 †)
Below 5 ‡ Approx.
(Ò15 †) 50 minutes
You can then switch on the auxiliary heating
again.
If you do not start the engine for a while, the
total duration of heating is limited to a maxi-
mum of 120 minutes to protect the starter
battery. Switching on the auxiliary heating is
then automatically disabled. You can, for
example, switch on the auxiliary heating with-
out the engine running if the outside temper-
ature is Ò5 ‡ (Ò20 †) a maximum of two
times. If you try it again, the indicator lamps in
the y button ( page 123) flash alter-
Y
nately for approximately 2 minutes to signal
switch-on interlock. The auxiliary heating can-
not be switched on without starting the
engine.
When the condition of charge of the starter
battery is sufficient again, the switch-on inter-
lock will be deactivated. To charge the starter
battery, let the engine run. The engine run
time required to reach the necessary condi-
Operating the auxiliary heating system
tion of charge depends on the outside tem-
perature and on the electrical consumers
switched on.
Outside tempera-
ture
Above 32 ‡ (0 †)
32 ‡ (0 †) to 14 ‡
(Ò10 †)
Below 14 ‡ (Ò10 †) at least 20 minutes
Possible
startup proce-
dures
Before switching on
6
Check the fuel level and top up if necessary.
X
The auxiliary heating is operated directly
using the vehicle's fuel. The tank must be at
least a quarter full to ensure that the aux-
3
iliary heating functions.
Switch on climate control (
X
Set the temperature control to the desired
X
temperature (
2
Set the air distribution as required
X
(
Y
Open the center (
X
vents (
middle position.
i
switches to heater booster mode after the
engine is started.
Operating with the button (control
panel)
Engine runtime
at least 10 minutes
at least 15 minutes
page 117).
Y
page 117).
page 121) and side air
Y
page 121) and set them to the
Y
The auxiliary heating automatically
123
page 116).
Y
Z