Front central operating unit, component description - GF54.21-P-4500LE

MODEL 216 as of model year 2009 /YoM 08

MODEL 221 as of model year 2009 /YoM 08

Shown on model 221 up to 31.5.2009

Location

The front central operating unit is located on the center console between the front seats.

Fig 1: Locating Front Central Operating Unit (Up To 31.5.2009)

Courtesy of MERCEDES-BENZ USA

Shown on model 221 as of 1.6.2009

Location

The front central operating unit is located on the center console between the front seats.

As of 1.9.2010 the legend on the transmission mode button (A40/9s8) (S-C-M) is replaced by "S-E-M".

Fig 2: Locating Front Central Operating Unit (As Of 1.6.2009)

Courtesy of MERCEDES-BENZ USA

Shown up to 31.5.2009

As of 1.6.2009 the button-free programming is replaced by the rear window roller sun blind button (A40/9s13) and the mute button by the button-free programming.

As of 1.9.2010 the legend on the transmission mode button (A40/9s8) (S-C-M) is replaced by "S-E-M".

Fig 3: Identifying Front Central Operating Unit Components

Courtesy of MERCEDES-BENZ USA

Task

The front central operating unit enables the user to operate all the comfort-relevant functions. Its tasks are as follows:

Reading in of signals
Transmit signals
Human-Machine Interface (HMI)

Reading in of signals

The input factors are read in via the following connections:

COU [ZBE] LIN (LIN A1)
Telematics CAN (CAN A)

COU [ZBE] LIN

The front central operating unit is a ZBE-LIN user and connected by the center console button group (S148) (up to 31.5.2009 with code (386) Preinstallation for cell phone", Universal Portable Cell Phone Interface system or code (389) Mobile phone preinstallation with universal interface USA/Canada).

Telematics CAN

The signals are read-in over the telematics CAN. The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Transmit signals

The front central operating unit sends signals over the following condition:

Telematics CAN

Telematics CAN

The signals are transmitted over the telematics CAN.

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

Schematic of control options in integrated rotary pushbutton

The rotary pushbutton can be used for the following operations:

Press: Down vertically
Turn: To left or right (with limit stop at start and end of menu)
Tilt: In the horizontal, vertical and in the diagonal direction

Fig 4: Identifying Rotary Pushbutton Control Options

Courtesy of MERCEDES-BENZ USA

Variants

With center console button group and transmission mode button (up to 31.5.2009 with code (386) Preinstallation for cell phone Universal Portable Cell Phone Interface system or code (498) Japan version)
With center console button group and transmission mode button group (with code (494) USA version)
Without center console button group (as of 1.6.2009)

Note the relevant equipment variant for the following buttons:

Multicontour seat quick select button (with code (409) Left/right front multicontour seats or with code (432) Left and right dynamic multicontour seat
Telephone/navigation quick select button (up to 31.5.2009 with code (386) Preinstallation for cell phone Universal Portable Cell Phone Interface system or as of 1.6.2009 with code (386) Comfort telephony or up to 31.5.2009 with code (389) Mobile phone preinstallation with universal interface USA/Canada or with code (498) Japan version)

	Wiring diagram, front central operating unit	Model 216	PE82.00-P-2060-97CAA
		Model 221	PE82.00-P-2060-97SAA