Preliminary Information

There are three designs of the heating and ventilation unit:

Heating and ventilation unit
Manually controlled heating and fresh air unit.

Heating and ventilation unit with A/C
Manually controlled heating and fresh air unit with additional A/C and recirculation.

Automatically controlled heating and ventilation unit, ACC
Heating and ventilation unit with automatic climate control, meaning that the unit automatically maintains the desired cabin temperature, irrespective of the temperature of the air outside. The design of the control panel varies slightly between year models.






The technical description can be said to consist of two parts. The first part covers heating and ventilation, with or without A/C. The second part covers the ACC unit.