To improve comfort, as from production break PU97, the IHKA features a second stratification adjuster. It is located on the rear compartment air outlet grille between the front seats. The temperature and air volume are controlled by two knurled wheels on the left and right next to the outlet grille.
This control is used to influence the heated air outlet temperature (Y-driver > 0 %). It is operated by means of a potentiometer and a switch for zero setting.
The switch is closed in zero position. The rear compartment motor assumes a defined position.
Note
From production date 09/97 to 03/98 (corresponding to SW07 and SW08) the rear compartment flap motor assumes the COLD position when the switch is closed. As from production date 03/98, the flap moves in the WARM direction in order to avoid draughts in the event of the flap leaking.