Problem
Possible causes/consequences and M Solutions
#
When automatic hardware detection is complete, set the day of the
week, time and operating duration (/ page 111).
#
Set the departure time (/ page 112).
Auxiliary heating auto‐
matically switches off
and/or cannot be
switched on.
The low-voltage protection system integrated in the control unit switches
auxiliary heating off as the on-board voltage is below 10 V.
#
Have the generator and the battery checked.
The electrical fuse has blown.
#
Replace the electrical fuse; see "Fuse assignment" supplement.
#
Have the cause of the faulty fuse investigated at a qualified specialist
workshop.
The auxiliary warm-air
heating is overheated.
The air ducts are clogged.
#
Ensure that the flow of hot air is not blocked.
#
Have the auxiliary heating checked at a qualified specialist work‐
shop.
Operating cargo compartment ventilation
If your vehicle is equipped with a roof ventilator,
you can admit fresh air to the load compartment,
or extract air from it as well.
#
Switch on the ignition.
#
To switch on and extract: press the switch
1 at the top.
The roof ventilator removes used air from the
load compartment.
#
To switch on and admit fresh air: press the
switch 2 at the bottom.
The roof ventilator feeds fresh air into the
load compartment.
#
To switch off: place the switch in the centre
position.
Climate control
113
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