Service Mode

To select service mode in the radio navigation display and operating panel:

Select "setting" with the rotary knob in the main menu and confirm by pressing the rotary knob.
Now press and hold the "menu" button until the "service mode" menu appears.
Select "operating panel" with the rotary knob in the "service mode" menu and confirm.
Display test
Select "display test" with the rotary knob in the "operating panel" menu and confirm.

The display test now begins by initially switching on every second display point and then switching on the display points not activated previously.

During the further test procedure, first all display points are switched off and then switched on again.

This display test serves to detect connections of display points among each other or interruptions in the display points.

The display test takes place automatically and is terminated after one complete run.

Button test
Select "button test" with the rotary knob in the "operating panel" menu and confirm.

FF now appears in the "button:" display for as long as the radio volume control knob, buttons or the menu selection control knob is not pressed.

All button functions can now be checked. The "FF" display with no buttons pressed changes to "01" when the radio volume control knob is pressed through to "02" to "19" depending on what button is pressed and to "20" when the menu selection control knob is pressed.

The button test is terminated by the control unit automatically if no button function is detected for a longer period of time.

Rotary knob test
Select "button test" with the rotary knob in the "operating panel" menu and confirm.

00 now appears in the "BM-INCR.SENSOR" display provided the menu select rotary knob is not turned. The menu select rotary button can now be turned slowly in counterclockwise direction to check its function. The display changes from "00" to "1F" and from "00" to "E0" when the rotary button is turned in clockwise direction. The test for the "RADIO-INCR.SENSOR" display takes place in the same way when the radio volume rotary button is turned in the same directions.

On completion of all tests, press the menu button to return to the main menu.

To select radio service mode in the radio navigation display and operating panel:

Radio service mode of the radio navigation operating unit can be selected by pressing the "TP" button within 8 seconds after switching on the radio and holding it pressed for longer than 8 seconds.

The button must be released when the heading "SERVICE" appears in the display. The first display under this heading is "SERIAL NUMBER" with the actual serial number below it. By pressing the rocker switch under the volume control (search function) to the left the previous display can be selected and by pressing it to the right, the next display is selected.

Following displays can be selected by pressing the rocker switch to the right:

Software version
GAL (speed-dependent volume control) with the set characteristic curve number (1-6) that can be set to the required characteristic curve by pressing the station buttons 1 to 6.
FM/AM and display of tuner data with the set frequency and, if applicable, RDS display. The field strength and reception quality of the tuned station is displayed in the line " F xx " and " Q xx ". The code indicated below it is the station identification code (if transmitted by the radio broadcaster). The reception mode can be set with the AM/FM button, the reception frequency set manually lower (1) and higher (2) with the station rocker switch "1/2" and the search function with rocker switch "3/4".
DSP (amplifier with digital sound processor), the display " DSP 0 " / " DSP 1 " indicates that no/a DSP amplifier is recognised.
SEEK LEVEL indicates the set threshold of a found station at which the search run stops. The threshold can be set by pressing the station rocker switch "1/2" to 1 or 2.
TP volume (travel pilot volume) indicates the set volume during traffic announcement. The volume can be set from -9 to +9 with the station rocker switch "1/2".