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

MODEL 463.306 /336 /346 up to 31.5.12 except CODE (ZJ1) Japan version as of Model Year 2011 /YoM 08 

MODEL 463.202 /222 /236 /237 /270 /271 /303 /340 /341 up to 31.5.12 except CODE (ZJ1) Japan version as of Model Year 2009 /YoM 08 

Fig 1: Telephone Switch-On/Switch-Off Characteristics Function Diagram
G07891407Courtesy of MERCEDES-BENZ USA

IMPORTANT Depending on the equipment installed one of the following control units will be installed, hereafter referred to as the "audio unit":

Function requirements, general 

IMPORTANT So that a bluetooth-capable mobile phone that is authorized on the audio equipment can be operated in the vehicle, the mobile phone must support the hands-free profile (HFP) 1.0 or 1.5. More information is available under:

Telephone switch-on/switch-off characteristics, general 

With basic telephony, without code (EH2) Comfort telephony, the mobile phone must be switched on or off manually via the buttons on the mobile phone.

With comfort telephony, with code (EH2) Comfort telephony, the mobile phone is switched on automatically by switching on the audio equipment via a wake-up pulse from the audio equipment or switched off via a corresponding signal or after a run-on time, set on the mobile phone, has passed. The "telephone switch-on.off characteristics" function consists of the following subfunctions:

The system is described using the comfort telephony as an example. Differences from the basic telephony are marked by the symbol IMPORTANT .

Switch on function sequence 

The switch-on signal from the audio equipment is transmitted to the UPCI [UHI] cell phone holder via a direct line and via the Bluetooth module.

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 query is displayed by the audio equipment via the display on the audio equipment as well as in the instrument cluster via interior CAN.

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 audio unit are processed internally.

The control signals from the VCS [SBS] are registered by the hands-free system microphone group and forwarded to the audio equipment via a direct line.

The audio equipment then transmits the PIN entry to the mobile service switching center via the following route:

After registering in the mobile telephone network, the name of the mobile telephone network is displayed on the mobile phone screen and in the display on the audio equipment in vehicles without code (ZU8) USA version.

In vehicles with code (ZU8) USA version the information is only displayed on the mobile phone screen.

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

The display on the mobile phone's screen is forwarded internally. The signals to be shown on the display of the audio equipment are transmitted via the following route:

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 mobile service switching center 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.

Switch off function sequence 

The switch-off signal from the audio equipment is transmitted to the UPCI [UHI] cell phone holder via a direct line and via the Bluetooth module. The mobile phone is then switched off and power supply interrupted. Expiration of the run-on time configured in the mobile phone takes place internally in the mobile phone.

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.

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. 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.

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