Air distribution

Demisting and defrosting the windscreen

Updated 7/23/2018

Heated windscreen* and max. defroster are used to quickly remove misting and ice from the windscreen and side windows.

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P4-1220-Y55X-Max defroster setting in display

The selected setting is shown in the centre console's screen.

Heated windscreen*
Max. defroster
P4-1246 Button Defroster

The light in the defroster button illuminates when the function is active.

Press the button repeatedly to change between the different levels or to deactivate the function.

For cars without heated windscreen there is one defrost level:

  • Air flows to the windows - symbol (2) illuminates in the screen.
  • Switch off the function - no symbol illuminates.

For cars with heated windscreen there are two defrost levels:

  • Start the heating for the windscreen

    If the character C is shown in the rearview mirror when the heated windscreen is activated then the compass* must be recalibrated.

    - symbol (1) illuminates in the screen.
  • Start the heating for the windscreen

    If the character C is shown in the rearview mirror when the heated windscreen is activated then the compass* must be recalibrated.

    and air flow to the windows - symbols (1) and (2) illuminate in the screen.
  • Switch off the function - no symbol illuminates.

Note

Heated windscreen and IR window may have an impact on the performance of transponders and other communication equipment.

Note

A triangular area at the end of each side of the windscreen is not electrically heated, where de-icing may take longer.

Note

Electrically heated windscreen is not available when the engine is auto-stopped.

The following also takes place when the max. defroster function is active in order to provide maximum dehumidification in the passenger compartment:

  • the air conditioning is automatically engaged
  • recirculation and the air quality system are automatically disengaged.

Note

The noise level increases as the fan is operating at max.

When the defroster is switched off the climate control returns to the previous settings.


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