Switch on/off behavior, function - GF82.85-P-2006AB

MODEL 215, 220 with CODE (352a) COMAND operating and display system with CODE (494a) USA version 

Switch on characteristics 

Navigation system activation 

When the driver's door is opened, navigation is activated via the interior CAN (CAN-B). This process lasts for approximately 2 seconds and may be accompanied by faintly audible noises from the DVD drive integrated in the navigation processor. The display of the COMAND operating, display and control unit (A40/3) remains switched off.

When the status of the ignition/starter switch then changes (e.g. Circuit 15R ON), the navigation system remains active for 30 min.

In vehicles as of 1.9.03, the navigation processor (N41/1) is installed as a separate control unit on the left-hand side of the trunk.

Activation of overall system 

The display is switched on when the transmitter key (A8/1) is turned to position 1 ("Circuit 15R ON") provided that the COMAND system was switched on when the transmitter key (A8/1) was last removed. The COMAND is now operational. The system which was active before the COMAND system was last switched off (e.g. radio) is switched on and the corresponding basic menu is displayed. If the COMAND system was switched off for longer than 30 minutes, a warning menu appears with general instructions on how to use the system.

All other subsystems are activated when the ignition/starter switch is turned to position 2 ("Circuit 15C ON").

Conduct when pushing the "ON" button 

COMAND can also be switched on when the transmitter key (A8/1) has been removed, by pressing the "ON" button. All COMAND functions are then available for 30 minutes. The COMAND system switches off automatically once this time has elapsed.

If the system switches off automatically after 30 minutes it can be switched back on again by pressing the "ON" button. The 30 minutes cycle then starts from the beginning.

Switch off characteristics 

COMAND is deactivated when the transmitter key (8/1) (Circuit 15C OFF") is removed of the ignition. Then the navigation system run-on time of 30 minutes starts (standby mode). During this period all the important locating parameters are stored.

Furthermore, the COMAND operating, display and control unit (A40/3) is in principle always active, when the interior CAN (CAN-B) is active. During this period COMAND can, however, only be operated if the above-mentioned switch-on conditions are met with.

Pressing the "Monitor ON/OFF" button only switches off the display.

Automatic switch off 

The COMAND central computer constantly monitors the battery voltage. Depending on the voltage value the system will act as follows:

• Battery voltage is between 11.5 and 9.5 V (battery warning area)

  If the battery voltage drops below 11.5 V a message appears on the display requesting that the driver switch on the engine. If the engine is not started, another warning appears after 3 minutes that 10 seconds remains to start the engine before the system switches off. In this case switching on the engine prevents the system from being automatically shut down. If the system has been switched off and the voltage reading rises again above 11.5 V, COMAND will not be automatically activated.

  If a system has been shut down it can be switched back on again manually. The warning procedure recurs each time until the fault has been rectified.

• Battery voltage less than 9.5 V (low voltage)

  The COMAND system is automatically switched to a defined waiting state in which only the battery voltage is monitored.

The current operating status is stored. In this condition COMAND cannot be operated or made to respond via STAR DIAGNOSIS. Communication with external components does not take place.

As of 1.9.02 the map is displayed again after the last driving direction has been given by the navigation system (arrival at destination). COMAND is switched off completely after a run-on time of 1 minute.

Exceptions to switch on/off behavior (run-on mode) if destination is not reached (as of 1.9.02):

• The navigation system remains active for up to 30 minutes (when fueling, when the driver is taking a break, etc.). The navigation is continued as soon as the engine is restarted.
• After 30 minutes up to a maximum of 2 hours the COMAND remains in the "sleep mode". The route is recalculated when the driver restarts the engine and navigation continues.
• When the driver starts the engine after an interval of 2 hours the system asks the driver if the route should be recalculated.

  YES = The route is recalculated.

  NO = Navigation ends.

Volume/tone adjustments, function

GF82.60-P-2003AB