Rear control panel control unit, component description - GF83.40-P-3020GMA

MODEL 164.1 as of model year 09/YoM model refinement package except CODE (581) Comfort automatic air conditioning

MODEL 164.8, 251.0/1 as of model year 09/YoM 08 except CODE (581) Comfort automatic air conditioning

Shown on model 164

Fig 1: Identifying Rear Control Panel Control Unit Component - Shown On Model 164

Courtesy of MERCEDES-BENZ USA

Location

The RCP [HBF] control unit is located in the extension of the center console in the 2nd seat row

Design

The RCP [HBF] control unit includes the following control and display elements:

AUTO button (1)
Headroom air distribution button (2)
Footwell air distribution button (3)
OFF button (4)

Task

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

Operation of the rear air conditioning
Reading in of signals
Actuation of components

Operation of the rear air conditioning

The RCP control unit allows the following actions:

Switching the temperature control ON and OFF
Manual air distribution
Automatic blower control and air distribution

It is operated with the following buttons:

AUTO button
Air distribution buttons
OFF button

AUTO button

The air volume and the air distribution are regulated automatically when the AUTO button is pressed.

If automatic mode is activated, the LED illuminates.

Air distribution buttons

Pressing the respective air distribution button enables the distribution of the air flowing into the rear area to be set manually.

When the function is activated, the LED illuminates.

OFF button

The temperature control in the rear can be switched off completely or switched back on by pressing the OFF button. The rear shut-off flap is opened or closed accordingly.

The LED lights up when the temperature control is switched off.

Reading in of signals

The input factors are read in via the following connection:

Interior CAN

Interior CAN

The signals are read in by the rear control panel control unit via the interior CAN.

The resulting functions are described in the relevant function descriptions (see block diagram or function schematic).

Actuation of components

The actuation of the components takes place via the following connections:

Interior CAN

Interior CAN

The signals are transmitted by the rear control panel control unit via the interior CAN. The resulting functions are described in the relevant function descriptions (see block diagram or function schematic).

	Wiring diagram for rear control panel control unit	Model 164	PE54.21-P-2125-99MAA
		Model 251	PE54.21-P-2125-99RAA