Note■The aux. 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 aux. heating.
Switch on / off
Fig. 119
Button for directly switching the operating part of the manual air
conditioning/Climatronic on/off
Read and observe
and on page 97 first.
Functional requirements of the aux. 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).
Direct switching on/off
The aux. heating can be directly switched on or off at any time using the but-
ton
» Fig. 119 on the operating part of the air-conditioning system, or the Cli-
matronic or via the radio remote control » page 99.
Automatic on / off ▶ Over a set and activated preset time in the MAXI DOTDisplay.
▶ According to the environmental conditions.
If the auxiliary heating has not already been switched off, it switches off auto-
matically after the running time set in the
Running time
menu.
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 aux. heating will
continue running a little while longer in order to burn the remaining fuel in the
heating.
For vehicles with gasoline engines, the automatic switching on and off of the
heater can be disabled in a specialist workshop.
System settings
Read and observe
and on page 97 first.
The following menu items can be selected from the
Aux. heating
menu item in
the MAXI DOT display (depending on the vehicle equipment). ■
Day of the wk.
- set the current day of the week
■
Running time
- Set the required running time in 5 minute increments. The run-
ning time can be 10 to 60 minutes.
■
Mode
- Set the desired heating/ventilation mode
■
Starting time 1
,
Starting time 2
,
Starting time 3
- for each pre-set time, the day and
the time (hour and minute) can be set for switching on the auxiliary heating.
An empty position can be found between Sunday and Monday when select-
ing the day. If this empty position is selected, the activation is performed
without taking into account the day.
■
Activate
- Activate pre-set mode
■
Deactivate
- Deactivate pre-set mode
■
Factory setting.
- Restore factory setting
■
Back
- return to main menu.
Only one programmed pre-set time can be active.
The last programmed pre-set time remains active.
After the auxiliary heating activates at the set time, it is necessary to pre-set a time again.
If the pre-set menu is closed by selecting the
Back
menu item or if no changes
are made on the display for more than 10 seconds, the set values are stored,
but the pre-set time is not activated.
An indicator light on the button is illuminated when the system is running.
The system in operation switches off on expiration of the operating duration
or can be deactivated earlier by pressing the direct on/off button or by using
the radio remote control.
98Using the system
No.Consumer27Panoramic tilt / slide sunroof, electric operation of sun blinds28Fuel pump, injectors, AdBlue®
heating29Electric windows - front, outside mirror - Heating, fold-in function,
Adjusting the mirror surface3012 volt power outlet - front and rear31Headlight cleaning system32Heated front seats33Heating, air conditioning, Climatronic, remote control for auxiliary
heating34Car alarm, reserve horn35Automatic gearbox36Tow hitch
Fuses in the engine compartment
Fig. 195
Distribution board cover.
Read and observe and on page 167 first.
With some equipment, the battery cover must be opened before removing the
cover for the fuse box » page 148.
Replacing fuses
›
Turn the securing bracket
A
» Fig. 195 in direction of the arrow. The symbol
is displayed behind the catches. .
›
Remove the cover.
›
Replace the appropriate fuse.
›
Replace the cover on the fuse box and the safety clip
A
move against the
arrow. The symbol is displayed behind the catches .
CAUTIONThe 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 risk of
damage to the vehicle!
Fuse arrangement in the engine compartment
Fig. 196
Fuses
Read and observe and on page 167 first.
No.Consumer1Not assigned2Automatic gearbox, AdBlue control system3Battery data module4ABS5Automatic gearbox6Not assigned7Power supply for terminal 15, starter8Radio, instrument cluster, telephone9Not assigned10Engine control system11Aux. heating and ventilation12Databus13Engine control system14Ignition15Lambda probe, fuel pump, glow plug system16Right headlight, right taillight17Horn 169Fuses and light bulbs
