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Telephone switch-on/switch-off characteristics, function - GF82.70-P-2007CW

MODEL 204.0 /2 with CODE (523) MB Audio 20 radio Basic telephony 

MODEL 204.0 /2 with CODE (510) Audio 20 with CD changer Basic telephony 

MODEL 204.0 /2 with CODE (525) MB Audio 50 APS radio Basic telephony 

MODEL 204.0 /2 with CODE (511) Audio 50 APS with DVD changer Basic telephony 

MODEL 204.0 /2 with CODE (527) COMAND APS with single DVD drive (with navigation) Basic telephony 

MODEL 204.0 /2 with CODE (512) COMAND APS with DVD changer Basic telephony 

MODEL 204.0 with CODE (494) USA version Basic telephony 

MODEL 204.0 /2 with CODE (386) Mobile phone Comfort telephony 

MODEL 204.0 with CODE (389) Mobile phone preinstallation with universal interface, USA/Canada Comfort telephony 

Function requirements 

IMPORTANT Depending on equipment installed, one of the following control units is installed:

The function description uses the term "master control unit".

General 

With basic telephony, the mobile phone must be switched on or off manually via the buttons on the mobile phone. With comfort telephony, the mobile phone is switched on automatically via a wake-up pulse from the "master control unit" by switching on the "master control unit" or is switched off via a corresponding signal, if this has been set on the mobile phone.

Function sequence for switching on with comfort telephony 

The switch-on signal from the "master control unit" is transmitted via a discrete line to the cradle. The mobile phone is then switched on and supplied with power. If set on the mobile phone, the Personal Identification Number (PIN) is requested after the mobile phone has been switched on. The PIN inquiry is displayed by the "master control unit" via a low voltage differential signaling (LVDS) line to the Audio/COMAND display (A40/8) as well as via the interior CAN to the instrument cluster (A1) (except Entry-Line).

Depending on the prompt, the 4 to 8-digit PIN must be entered in one of the following ways:

The control signals from the telephone buttons of the "master control unit" are processed internally.

The control signals from the VCS [SBS], with code (511) Audio 50 APS with DVD changer, with code (527) COMAND APS with single DVD drive (with navigation) or with code (512) COMAND APS with DVD changer, are acquired by the voice control system microphone (B25/7) and forwarded via a discrete line directly to the "master control unit".

Then the "master control unit" transmits the PIN entry to the Mobile Service Switching Center (MSC) in the following way:

After registering in the service provider's mobile telephone network, the name of the mobile telephone network is given on the mobile phone screen and on the Audio/COMAND display in vehicles with code (386) Mobile phone.

The mobile phone signals or data are received in the following way:

The display on the mobile phone's screen is forwarded internally. The display on the Audio/COMAND display is transmitted in the following way:

IMPORTANT For basic telephony, the switch-on signal is processed internally in the mobile phone. The PIN inquiry, if set on the mobile phone, is only displayed on the mobile phone's screen. The PIN is only entered via the buttons on the mobile phone. The PIN entry is transmitted to the MSC and the registration confirmation is provided via the mobile phone's antenna. The mobile phone network name is also displayed just on the mobile phone's screen. The display of the PIN, of the mobile phone network name and the signals of the buttons on the mobile phone are processed internally in the mobile phone.

Function sequence for switching off with comfort telephony 

The switch-off signal from the "master control unit" is transmitted via a discrete line to the cradle. The mobile phone is then switched off if this is set on the mobile phone and the power supply is interrupted.

IMPORTANT For basic telephony, the switch-off signal is processed internally in the mobile phone. If the rechargeable battery of the mobile phone is empty, the mobile phone is also switched off. This process also runs internally in the mobile phone.

IMPORTANT By switching off the mobile phone and then subsequently removing the SIM card, the mobile phone is taken out of operation. The SIM card may only be removed after the mobile phone has been deactivated in order to prevent permanent damage to the memory chip provided on the SIM card.

Supplemental information 

The PIN serves to prevent any unauthorized use of the SIM card. The SIM card is locked after the PIN has been entered incorrectly 3 times. In vehicles with code (386) Mobile phone, the SIM card is enabled again by entering the personal 8-digit Personal Unblocking Key (PUK) using the buttons on the mobile phone for basic telephony and comfort telephony.

This allows entry of a new PIN number. If the PUK is entered incorrectly 10 times in succession, the SIM card can no longer be used and a new SIM card must be applied for from the service provider.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic for mobile phone switch on and switch off characteristics With code (386) Mobile phone
With code (512) COMAND APS with DVD changer
with CODE (810) Sound system
Comfort telephony		 PE82.70-P-2054-99FAA
With code (389) Mobile phone preinstallation with universal interface, USA/Canada
With code (512) COMAND APS with DVD changer
with CODE (810) Sound system
Comfort telephony
Model 204.0 with code (359) TELE AID emergency call system		 PE82.70-P-2054-99FAB
  Front central operating unit, component description A40/9 GF54.21-P-4500CW
  Cockpit central display, component description A40/8
with code (523) MB Audio 20 radio
with CODE (494) USA version
With code (510) Audio 20 with CD changer
with CODE (525) MB Audio 50 APS radio
With code (511) Audio 50 APS with DVD changer Entry		 GF54.30-P-6100CW
A40/8
With code (527) COMAND APS with Single
DVD disk drive (with navigation)
With code (512) COMAND APS with DVD changer High		 GF54.30-P-6100CWH
  Radio control panel, component description A2
with code (523) MB Audio 20 radio		 GF82.60-P-3116CW 
A2
with CODE (494) USA version		 GF82.60-P-3116CWA 
A2
With code (510) Audio 20 with CD changer		 GF82.60-P-3116CWB 
  Radio/navigation unit, component description A2/56
with CODE (525) MB Audio 50 APS radio		 GF82.61-P-4111CW 
A2/56
With code (511) Audio 50 APS with DVD changer		 GF82.61-P-4111CWA 
  Audio tuner control unit, component description N40/3
with CODE (810) Sound system		 GF82.62-P-3132CWS 
  Telephone and GPS roof antenna component description A28/11
With code (386) Mobile phone
With code (389) Mobile phone preinstallation with universal interface, USA/Canada		 GF82.62-P-4119CW 
  Bluetooth antenna, component description A2/91 GF82.62-P-4201CW 
  Frequency switchover control unit, component description N96
Model 204.0
With code (359) TELE AID emergency call system
With code (389) Mobile phone preinstallation with universal interface, USA/Canada		 GF82.62-P-4204CWU 
  Speaker system, component description H4/1, H4/2, H4/3, H4/4, H4/27 Except code (810) Sound system GF82.62-P-4220CW 
H4/1, H4/2, H4/3, H4/4, H4/27, H4/29, H4/54, H4/57 with CODE (810) Sound system GF82.62-P-4220CWS 
  Hands-free system microphone, component description B25/7 GF82.70-P-4121CW 
  Mobile phone bracket, component description A34/15
With code (386) Mobile phone
With code (389) Mobile phone preinstallation with universal interface, USA/Canada		 GF82.70-P-5300CW 
  COMAND controller unit, component description A40/3
With code (527) COMAND APS with Single DVD disk drive (with navigation)		 GF82.85-P-3136CW
A40/3
With code (512) COMAND APS with DVD changer		 GF82.85-P-3136CWA
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