Switching the function on/off
X
Turn the key to position
0 in the ignition lock
or remove it.
X
Press the
Ì
button.
If the residual heat utilisation function is acti-
vated, the indicator lamp in the
Ì
button
comes on.
The blower will run at a low speed regardless
of the airflow setting.
If you activate the residual heat function at
high outside temperatures, only the auxiliary
ventilation will be activated. The blower then
runs at medium speed.
The residual heat function switches off auto-
matically:
R
after approximately 30 minutes
R
if the starter battery's charge status is too low
R
when you switch on the ignition
R
if the hot-water auxiliary heater is switched on
Operating the auxiliary heating sys-
tem
Important safety notes
G
DANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes may enter the vehicle, especially car-
bon monoxide. This is the case in enclosed
spaces or if the vehicle is stuck in snow, for
example. There is a risk of fatal injuries.
Switch off the auxiliary heating in enclosed
spaces without extraction systems, e.g. in a
garage. If the vehicle is stuck in snow and you
have to leave the auxiliary heating running,
keep the exhaust pipe and the area around the
vehicle clear of snow. To guarantee a suffi-
cient supply of fresh air, open a window on the
side of the vehicle away from the wind.
G
WARNING
Parts of the vehicle, e.g. the exhaust system,
may become very hot when the auxiliary heat-
ing system is switched on.
Flammable material, such as leaves, grass or
twigs, may ignite if it comes into contact with:
R
hot parts of the exhaust system
R
the exhaust gas itself
There is a risk of fire.
Make sure, when the auxiliary heating system
is switched on, that:
R
hot vehicle components do not come into
contact with flammable material
R
exhaust gases can emerge unobstructed
from the exhaust pipe
R
exhaust gases do not come into contact
with flammable material
The heating unit for the auxiliary heating is fitted
at the front of the vehicle underbody. The emis-
sions outlet is on the left side of the vehicle
below the front door.
G
WARNING
Vehicles with an auxiliary warm-air heater:
If work on the heat exchanger of the auxiliary
warm-air heater is not performed correctly,
exhaust fumes could leak into the passenger
compartment. There is a risk of poisoning,
possibly even fatal.
You should have all work on the auxiliary
warm-air heater carried out at a qualified spe-
cialist workshop.
When transporting hazardous goods, always
observe the relevant safety regulations. Always
place objects a sufficient distance from the aux-
iliary heating vent.
Your vehicle may be equipped with either a hot-
water auxiliary heater or an auxiliary warm-air
heater. Adjustment and operation of the:
R
hot-water auxiliary heater can be activated via
the
&
button in the centre console, the on-
board computer or by using the remote con-
trol (
Y
page 146)
R
auxiliary warm-air heater can be activated via
the timer in the stowage compartment below
the centre console (
Y
page 152) or via the
remote control (
Y
page 150)
144
Operating the auxiliary heating system
Climate control
