Differences From E38 IHKA

There is only one desired blower speed input.
Eight distinct blower speeds are available.
Blower speed is shown on the digital LCD display.
No face vent air temperature sensors.
No auxiliary coolant pump.
Dedicated IHKA system ambient temperature sensor.
Engine control module controls the A/C compressor.
One set of air distribution buttons for both left and right sides.
No windshield or washer spray jet heaters.
Sensor values and other input status data can be displayed on the control panel/module.
No "Rest" function.
No console outlet rear flap.