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Home >> Mercedes Benz >> 2013 >> CL600 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Accessories Control Systems >> Battery, Collision Avoidance, Control Modules/Units, Displays, & Fuse/Relay Assignment -- Basic Knowledge -- Cl600 (216.376) >> Basic Knowledge >> Front central operating unit, component description - GF54.21-P-4500LE

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 

Fig 1: Identifying Front Central Operating Unit
G07539294Courtesy of MERCEDES-BENZ USA

Location 

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

Shown on model 221 as of 1.6.2009 

Fig 2: Identifying Front Central Operating Unit
G07539295Courtesy of MERCEDES-BENZ USA

Location 

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

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

Shown up to 31.5.2009 

Fig 3: Identifying Front Central Operating Unit
G07539296Courtesy of MERCEDES-BENZ USA

IMPORTANT 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.

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

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 

The input factors are read in via the following connections:

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 

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 push-button 

The rotary push-button can be used for the following operations:

Variants 

Note the relevant equipment variant for the following buttons:

REFER TO SYSTEM WIRING DIAGRAMS Wiring diagram, front central operating unit Model 216 PE82.00-P-2060-97CAA
Model 221 PE82.00-P-2060-97SAA