WARNING■The auxiliary heating must never be operated in closed rooms (e.g. garag-
es) – risk of poisoning!■
The auxiliary heating must not be allowed to run during refuelling – risk
of fire.
■
The exhaust pipe of the auxiliary heating is located on the underside of
the vehicle. If you want to use the auxiliary heating, do not park the vehicle
in places where the exhaust fumes can come into contact with flammable
materials such as dry grass, undergrowth, leaves, spilled fuel etc. - There is
a risk of fire.
CAUTION
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 only switches the blower on, if it has achieved a coolant
temperature of approx. 50 °C.■
In the engine compartment, water vapour may form during the operation of
the heater.
Switch on / off
Fig. 134
Button for switching on / off (Climatronic / manual air condition-
ing)
Read and observe and on page 109 first.
Functional requirements of the auxiliary heating.
The charge state of the vehicle battery is sufficient.
The fuel supply is adequate (the warning light
is not illuminated in the
instrument cluster).
Manual on / off ▶ Using the
button on the control panel of the air conditioning » Fig. 134.
▶ Using the
(switch on) /
(switch off) button on the remote control opera-
tion.
Automatic on / off ▶ Via an automatically programmed and activated pre-set time in Infotainment.
▶ According to the environmental conditions.
Switching off the auxiliary heating takes place automatically when there is a
lack of fuel (warning light in the instrument cluster lights up).
After switching off the system, the coolant pump and the auxiliary heating will
continue running a little while longer in order to burn the remaining fuel in the
heating.
Setting automatic on / off
Climatronic: on the Climatronic button
→ Tap the function area
in the
Infotainment screen. There will be a display of the last set operating mode
with the option to change this.
Manual air conditioning: on Infotainment, press the button
→ Tap the
function surface .
Then follow the instructions on the Infotainment screen.
When automatic switching on is activated, the warning light in the symbol
button lights up for about 10 seconds after the ignition is turned off » Fig. 134.
109Heating and ventilation
No.Consumer50Opening the boot lid51Multi-function unit for taxi vehicles52Voltage stabiliser for taxi vehicles53Rear window heating
Fuses in the engine compartment
Fig. 328
Fuse panel cover: Removing cover / plastic clip for fuses
Read and observe
and on page 278 first.
Replacing fuses
›
Remove the ignition key, turn off the lights and all electrical consumers.
›
Press together the lock buttons of the cover simultaneously in the direction
of arrow
1
and remove the cover in the direction of arrow
2
» Fig. 328 .
›
Remove the plastic clip under the cover of the fuse box » Fig. 328.
›
Use the clip to pull the fuse out, then insert a new fuse.
›
Replace the clamp in the original position.
›
Replace the cover, push the lock buttons of the cover together and lock.
CAUTION
The cover of the fuse box in the engine compartment must always be used
correctly, otherwise water may penetrate into the fuse box – there is a danger
of damage to the vehicle!Fuse assignment in engine compartmentFig. 329
Fuses
Read and observe and on page 278 first.
No.Consumer1ESC, ABS2ESC, ABS3Engine control system4Radiator fan, oil temperature sensor, air mass meter, valve for fuel
pressure control, electric auxiliary heater, oil pressure relief valve,
valve for exhaust gas recirculation5Ignition coil of CNG relay, fuel injectors, fuel metering valve6Brake sensor7Coolant pump, radiator shutters, oil pressure valve, gear oil valve8Lambda probe9Ignition, preheating unit, flue damper, heating the crankcase venti-
lation10Fuel pump, ignition11Electrical auxiliary heating system12Electrical auxiliary heating system13Automatic gearbox14Windscreen heater15Horn16Ignition, fuel pump17ABS, ESC, motor control system, Relay for heated windscreen18Databus, battery data module 281Fuses and light bulbs
