CAUTION■The running auxiliary heater consumes fuel from the vehicle tank and auto-
matically controls the filling level. If only a low quantity of fuel is present in the
fuel tank, the auxiliary heating switches off.■
The exhaust pipe of the auxiliary heating, which is located on the underside
of the vehicle, must not be clogged and the exhaust flow must not be blocked.
■
If the auxiliary heating is running, the vehicle battery discharges. If the auxili-
ary heating and ventilation has been operated several times over a longer peri-
od, the vehicle must be driven a few kilometres in order to recharge the vehi-
cle battery.
■
The air inlet in front of the windscreen must be free (e.g. of ice, snow or
leaves) to ensure that the auxiliary heating operates properly.
Note
■ The auxiliary heating switches on the blower B » Fig. 125 on page 119 orC » Fig. 126 on page 119 only if it has achieved a coolant temperature of ap-
prox. 50 °C.■
At low outside temperatures, this can result in a formation of water vapour in
the area of the engine compartment. This is quite normal and is not an operat-
ing problem.
■
So that warm air can flow into the vehicle interior after switching on the aux-
iliary heating, you must maintain the comfort temperature normally selected
by you, leave the fan switched on and leave the air outlet vents in an open po-
sition. It is recommended to put the air flow in the position
or
.
Switching on/off
Fig. 127
Button for switching on/off the system directly on the operating
part of the air conditioning/Climatronic
Read and observe and on page 121 first.
The auxiliary heating can be switched on/off as follows.
Manually switching on Using the button on the operating part of the manual air conditioning/Cli-
matronic. The indicator light in the button illuminates » Fig. 127.
By using the radio remote control » page 123.
Manually switching off Using the button on the operating part of the manual air conditioning/Cli-
matronic. The indicator light in the button goes out » Fig. 127.
By using the radio remote control » page 123.
After switching the system off, the auxiliary heating will continue running a lit- tle while longer in order to burn the remaining fuel in the auxiliary heater.
After switching off the auxiliary heating, the coolant pump still runs for a short
period.
Switching on automatically
The auxiliary heater is switched on according to the Infotainment set-
tings » Infotainment manual , chapter Vehicle settings .
When automatic switching on is activated, the indicator light in the symbol
button lights up for about 10 seconds after the ignition is turned off.
Switching off automatically
Turning off the auxiliary heating occurs in the following cases.
› The switch-off time set in Infotainment has been achieved
» Operating in-
structions for Infotainment , chapter Vehicle settings .
› The fuel level has reached the reserve area (the warning icon
illuminates).
› The charge state of the vehicle battery has reduced too much
» page 200.
122Using the system
Index
A
abroad lead-free petrol
189
Abroad Headlights
78
ABS Function
138
Warning light37
ACC149
Control symbols44
Warning light36
Acceptance and recycling of used vehicles180
Accessories177
Adaptive cruise control149
automatic stop-start152
Information messages155
Operation151
Operation Overview152
Radar sensor150
Set/change the desired speed.153
Set time interval level153
special driving conditions154
Start control152
Stop/resume control153
Adaptive headlights (AFS)
74
Adjust Auxiliary heating (auxiliary heating and ventila-tion)
122
Adjusting Belt height
15
Exterior mirrors85
head restraints88
Interior mirror84
seats87
Steering wheel10
the seats electronically87
Adjusting the seats9
Adjusting the seats electronically87
Adjustment Headlight beam
71
Advance warning/emergency brake Warning symbol
45
AFS74
Air-conditioning system Air outlet vents
116
Airbag16
Deactivating21
Deactivating the front passenger airbag21
Deployment16
Front airbag17
Head airbag20
Knee airbag18
Modifications and damage to the airbag system 179
Side airbag
19
Air bag Warning light
38
Airbag system16
Air conditioning116
Air distribution control117
Climatronic119
manual air conditioning119
Air distribution control117
Air outlet vents116
Alarm Switching off
59
Triggering59
Alcantara cleaning
187
Anti-theft alarm system Activating/deactivating
59
Trailer176
Anti-theft wheel bolts217
Antilock Braking System138
Armrest Front
91
Rear91
artificial leather187
Ashtray97
ASR warning light
37
Assistance systems ACC
36
Driving mode160
ESC138
Front Assistant155
High beam assistant75
Lane Assist162
MCB140
TSA140
Assist system ABS
138
Assist systems138
ABS37
Adaptive cruise control149
ASR37
Cruise Control System148
DSR139
EDL139
ESC37
HBA140
HHC140
Park assist144
Parking aid140
ProActive passenger protection161
START-STOP158
TCS139
XDS139
Audio see radio/navigation system
4
Auto-check control47
Automatic driving lamp control73
Automatic gearbox133
Selector lever-emergency unlocking226
Selector lever lock134
Starting-off and driving135
Tiptronic134
Using the selector lever133
260Index
