Rear Control Panel Control Unit, Component Description - GF83.40-P-3020GR

MODEL 166 up to model year 2016 with CODE 581 (Comfort automatic air conditioning)

MODEL 166 up to model year 2016 with CODE 872 (Electrically heated left and right rear seats)

Control element	Controllable function	Operating feedback
Increase air volume button (1)	Increase air volume	Air volume indicator (2)
Reduce air volume button (3)	Reduce air volume	Air volume indicator (2)
Temperature control (4)	Setting of specified temperature	Integrated LED
"AUTO" button (5)	Automatic mode ON/OFF	Integrated LED
"OFF" button (6)	Temperature control ON/OFF	Integrated LED
Headroom air distribution button (7)	Air distribution up	Integrated LED
Footwell air distribution button (8)	Air distribution down	Integrated LED
Left seat heater button, 2nd seat row (with CODE 872 (Electrically heated left and right rear seats))	Seat heater ON/OFF	Integrated LED
Right seat heater button, 2nd seat row (with CODE 872 (Electrically heated left and right rear seats))	Seat heater ON/OFF	Integrated LED

Location

The RCP [HBF] control unit is located in the center console between the front seats.

Task

The rear compartment climate control and seat heater functions can be set by the rear passengers via the RCP [HBF] control unit.

The RCP [HBF] control unit has the following tasks:

Reading in of signals

The RCP [HBF] control unit also reads in the following input factors over the interior CAN (CAN B):

Terminal status of terminal 15
Circuit 58d (Switch illumination)
Instrument illumination brightness
Energy management status
Seat heater status (with CODE 872 (Electrically heated left and right rear seats))

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.

Output of signals

The following signals are issued over the interior CAN:

To the AAC control and operating unit (N22/7):
- Request for higher or lower air volume
- Request for higher or lower temperature in rear area
- Temperature control switch-off in rear area
- Automatic regulation of air volume and distribution
To rear control unit (N10/8):
- Seat heater request through left rear seat heater button, 2nd seat row (N72/2s10) or the right rear seat heater button, 2nd seat row (N72/2s11) (with CODE 872 (Electrically heated left and right rear seats))

Wiring diagram for rear control panel control unit