Page 137 of 393

136 Controls in detailTempmatic
3
The glove box can be ventilated when
Tempmatic is switched on, e.g. to cool its
contents.
1To switch the air supply on / off
\1To switch on: press switch1 to the
left.
\1To switch off: press switch1 to the
right.1Air conditioning in the rear
2Airflow control
3Temperature selector control
\1To switch on: press the switch.
The indicator lamp in the switch comes
on.
\1To switch off: press the switch.
The indicator lamp in the switch goes
out.Setting the airflow
The airflow is set using the airflow control
for the rear compartment.
\1To increase: press theQ airflow
control.
\1To reduce: press the airflow
control.
The display next to the airflow controls
indicates the speed of the airflow.
Setting the temperature
Only change the temperature in small in-
crements.
\1To increase: turn the temperature se-
lector control clockwise.Ventilated glove box*
Air conditioning in the rear*
N83.60-2009-31
iYour vehicle may be equipped with an
air-conditioning system in the rear
compartment and / or a rear heater.
If both systems are installed and the
temperature selector control is in the
middle position, only one of the sys-
tems operates and air-recirculation
mode is active.
Page 138 of 393
137 Controls in detail
Tempmatic
3
\1To reduce: turn the temperature selec-
tor control counterclockwise.
Air vents in the roof air duct
Adjustable air vents are integrated in the
roof air duct.
1Air vents
\1Adjust the airflow by opening / closing
the air flaps.
Alter the air distribution by turning the
air vents.The fuel-fired heater booster system heats
the vehicle interior as quickly as possible
while the engine is running.
The switch for the heater booster function
is between the light switch and the steer-
ing wheel.
Vehicles with auxiliary heatingVehicles without auxiliary heating*
1To switch the auxiliary heating on / off
(\2page 140)
2To switch the heater booster function
on / off
!
CAUTION
Never close all the air vents, otherwise
there is a risk of damage to the air-
conditioning system in the rear com-
partment.
Heater booster function*iThe auxiliary heating automatically
switches to heater booster mode after
the engine is started.
N54.25-2926-31
N54.25-2927-31
Page 139 of 393
138 Controls in detailTempmatic
3
\1To switch on: press the switch³.
The indicator lamp in the switch comes
on.
\1To switch off: press the³ switch
again.
The indicator lamp in the switch goes
out.
The heater booster function operates
for around a further 2 minutes and then
switches off automatically.The vehicle is equipped with an electrically
powered heater booster system.
The heater booster system ensures that
the vehicle interior is heated up as quickly
as possible during the engine’s warm-up
phase.
iIf you switch off the engine without
switching off the heater booster func-
tion, the system will be switched on the
next time the engine is started (memo-
ry function).
Electrical heater booster systemiThe heater booster system switches on
automatically as required.
Page 140 of 393

139 Controls in detail
Auxiliary heating/ventilation*
3
\3 Auxiliary heating/ventilation*The auxiliary heating heats or ventilates
the interior to a temperature that you have
set. The auxiliary heating can be operated
with the engine switched on or off.
The auxiliary heating is equipped with a
water heater.
The auxiliary heating heats the coolant and
the vehicle interior and is therefore more
favorable to the engine and consumes less
fuel. The fuel tank must be at least a quar-
ter full to ensure that the auxiliary heating/
ventilation operates correctly.
The maximum heating period is
60 minutes.You can use the auxiliary heating / ventila-
tion to:
\4ventilate or preheat the vehicle interior
and to de-ice the windows
\4start the engine better in cold weather
\4support the vehicle’s heating system
while the engine is running and outside
temperatures are low (heater booster
function) (\2page 137)
You can use the operating system to define
up to three switch-on times, one of which
can be selected to switch on the auxiliary
heating / ventilation (\2page 142). Warning
G
Exhaust fumes are produced while the auxilia-
ry heating is in operation. For this reason,
switch off the auxiliary heating in enclosed
spaces without an extraction system, e.g. a
garage.
Operation of the auxiliary heating system is
prohibited at gas stations or when refueling
your vehicle. The auxiliary heating must there-
fore be switched off at refueling stations.
Warning
G
Observe the relevant safety regulations in the
case of vehicles used for the transport of haz-
ardous goods.
Aerosols, gas cartridges and other pressur-
ized containers transported in the vehicle may
be highly flammable and could explode when
heated.
Make sure that the containers described are
kept away from the flow of hot air from the
auxiliary heating.
Otherwise, you could endanger yourself and
others.
iThe auxiliary heating automatically
switches to heater booster mode after
the engine is started.
Page 141 of 393

140 Controls in detailAuxiliary heating/ventilation*
3
You can switch the auxiliary heating / ven-
tilation on and off immediately using:
\4the auxiliary heating / heater booster
switch (\2page 140)
\4the auxiliary heating remote control*
(\2page 141)
Before switching on
\1Adjust the heat output to the desired
temperature using the temperature
control (\2page 131).
\1Set the air distribution as required.Operation using the switch
The switch for the auxiliary heating / venti-
lation is between the light switch and the
steering wheel.
1To switch the auxiliary heating on / off
2To switch the heater booster function
on / off (\2page 137)
\1To switch the auxiliary heating on:
press and hold theö switch for
more than 2 seconds:
\4The auxiliary heating / ventilation
heats or ventilates the interior to a
temperature that you have set.
\4The blower switches to the first
speed.\4The red indicator lamp in the switch
comes on.
\1To switch the auxiliary heating off:
press theö switch.
or
\1Turn the key to position0 in the igni-
tion lock (\2page 67).
The red indicator lamp in the switch
goes out.
The auxiliary heating operates for
around a further 2 minutes and then
switches off automatically.
!
CAUTION
Switch on the auxiliary heating at regu-
lar intervals (at least once a month) for
approximately 10 minutes.
Make sure that the hot air flow is not
obstructed. The auxiliary heating would
otherwise overheat and switch off.
N54.25-2928-31
iYou cannot use the auxiliary ventilation
to cool the vehicle interior to a lower
temperature than the outside tempera-
ture.
The heating or ventilation period is lim-
ited to 60 minutes.
Page 142 of 393

141 Controls in detail
Auxiliary heating/ventilation*
3
Operation using the remote control*
The remote control has a maximum range
of approximately 600 meters. The range
may be reduced by:
\4sources of interference
\4solid objects between the remote con-
trol and the vehicle
\4the remote control being in an unfavor-
able position
\4transmitting from an enclosed space
You can use up to 4 remote control units
on the vehicle.
1Indicator lamp
2To switch the auxiliary heating on
3To switch the auxiliary heating off\1To switch the auxiliary heating on:
press button2.
Indicator lamp1 lights up briefly.
\1To switch the auxiliary heating off:
press button3.
Indicator lamp1 lights up briefly.
The auxiliary heating operates for
around a further 2 minutes and then
switches off automatically.Synchronizing the remote control
\1Press and hold theö switch for
more than 10 seconds:
The red indicator lamp in theö
switch remains lit until it is released.
Afterward, the red indicator lamp in
theö switch flashes. The system is
activated for synchronizing.
\1Press button2 on the remote control.
The indicator lamp in theö switch
stops flashing and goes out. The re-
mote control and the control panel are
synchronized.
iChange the batteries immediately if in-
dicator lamp 1 does not light up brief-
ly each time a button is pressed
(\2page 316).
iIf you press button3 on the remote
control during the first 3 seconds of
synchronization process, only this re-
mote control will be synchronized with
the clock.
Any other remote control units that
were synchronized will be cleared.
Page 143 of 393

142 Controls in detailAuxiliary heating/ventilation*
3
Selecting a switch-on time
You can use the operating system to define
up to 3 switch-on times, one of which can
be selected to switch on the auxiliary
heating / ventilation.
Operating system without steering
wheel buttons
\1Switch on the ignition (\2page 67).
\1Press theö switch.
Theö symbol in the display flashes.
or
\1Press the menu button on the in-
strument cluster repeatedly until the
ö symbol in the display flashes.
\1Use the or button on the instru-
ment cluster to select desired switch-
on time
1 to
3.
The switch-on time selected is dis-
played.\1Wait 10 seconds for the standard dis-
play to appear.
The switch-on time is selected.
The yellow indicator lamp in theö
switch comes on.
If you have not selected a switch-on time
and
--:--
appears in the display, the auto-
matic switch-on is deactivated. The yellow
indicator lamp in theö switch goes
out.Operating system with steering wheel
buttons*
\1Switch on the ignition (\2page 67).
\1Briefly press theö switch.
The
Aux. heat.
submenu is shown in
the display.
The selected switch-on time is high-
lighted or
Timer off
is highlighted if no
switch-on time has been selected.
\1Press theæ orç button to se-
lect the desired switch-on time. The au-
tomatic switch-on is deactivated if the
Timer off
setting is selected.
iIf you turn the key to position0 in the
ignition lock, the yellow indicator lamp
in theö switch goes out after
30 minutes.
The red indicator lamp in theö
switch comes on when the auxiliary
heating switches on.
iYou can reach the
Aux. heat.
submenu
via the
Settings
menu (\2page 96).
N54.32-2277-31
\2\2
Page 144 of 393

143 Controls in detail
Auxiliary heating/ventilation*
3
\1Press the è button.
The switch-on time is selected.
The yellow indicator lamp in theö
switch comes on.
Setting the switch-on time
Operating system without steering
wheel buttons
\1Select a switch-on time as described
under “Selecting a switch-on time”
(\2page 142).\1Press the reset button on the instru-
ment cluster to set the selected switch-
on time.
The hours figure flashes and the”
symbol appears in the display.
\1Set the hours using the or am
button on the instrument cluster.
\1Press the reset button.
The minute display flashes.
\1Set the minutes using the or
button.Operating system with steering wheel
buttons
\1Select a switch-on time as described
under “Selecting a switch-on time”
(\2page 142).
\1Press thej button.
The
Hours
menu appears in the display.
\1Set the hours using theæ orç
button.
\1Press thej button.
The
Minutes
menu appears in the dis-
play.
\1Set the minutes using theæ
orç button.
\1Press the è button.
The switch-on time is set and selected.
iIf you turn the key to position0 in the
ignition lock, the yellow indicator lamp
in theö switch goes out after
30 minutes.
The red indicator lamp in theö
switch comes on when the auxiliary
heating switches on.
iIf you keep the button pressed, the val-
ues will change continuously.
To return to the standard display:
\4press and hold the button on
the instrument cluster for more
than 1 second
\4do not press a button for
10 seconds
iTo return to the standard display, press
theè or ÿ button repeatedly
until the standard display appears.