Function Test

MID Function Tests
The MID offers an integrated function test for workshop testing purposes. The test menu is called up by simultaneously pressing the first and the last menu button while switching on the ignition. This menu is generated by the MID itself, and the tests are carried out by the MID. The display is disabled for the testing period, even in the event of a display request. The test is also possible without the I/k BUS connected.

The following are offered in the test menu (selection carried out via the MID rocker buttons):
- DISPLAY: Display test
- KEYS: Button functions
- VOLUME: Increment sensor test
- LEDS: for LED function displays

The test is concluded by switching the ignition oft or after a time out of 5 seconds has elapsed after the last button actuation.

Display Test
The following are activated in succession on a 3 second cycle:
- All characters with all DOTs
- All characters with number symbol pattern
- All characters with "Z" pattern
- All special text labels: LIMIT, LIMITE, MEMO, STOPPUHB, All special text labels together

LED Function Test
The LEDs are activated in succession on a 3 second cycle:
1 Main line light chamber off
2 Menu line light chamber off
3 TELEPHONE LED red
4 TELEPHONE LED yellow
5 TELEPHONE LED green
6 Heating-ventilation symbol LED

After the end of the test sequence the test menu appears once again.

Button Function
The principle of the test lies in visual feedback to the pressing of a button. The menu buttons, selection buttons, the search rocker button and the AUDIO on/off button are tested. The number of the button pressed is displayed in the main display as a reaction. When calling up the test, the menu line is erased and the character "_" is displayed in the main line.

Exiting back to the test menu takes place by means of the time out of 5 seconds after the last button actuation or ignition off.

Increment Sensor Test (Volume)
As in the case of the test for the button function visual feedback takes place with each sensor increment.

Shown in the main display is a two-character counter beginning with the dual character "- -" . With each increment to the right the value increases by one up to a maximum of 36 which corresponds to one revolution. If rotation is carried out to the left, the value decreases by one.

The test is concluded by calling up a new test from the test menu or through general exiting of the function test via the time out or switching the ignition off.

High Line Audio Operation
All of the functions of the High Line/Multi-Function Display are controlled from the Multi-Function Display. Additional controls are provided by steering wheel mounted switches and (where fitted) voice operated control.