Trip Computer: Description and Operation

Multi-Information Display (MID):

Functional Description:

The multi-information display (MID) is a display and operating instrument On the request of the driver (function keys of the MID), vehicle information (on-board computer information) are transferred from the EKM to the MID and displayed. The driver can also call up information in the MID via the steering drop arm.

In contrast to the E 32/34, this information is not displayed in the instrument cluster.

Differing from the on-board computer installed in the E 32/34, the MID itself does not perform any mathematical calculations.

System Components:

20-segment dot matrix display for vehicle information and check control messages
Dot matrix display for time of day/date indication
Service interval display (colored LEDs)
keyboard with 11 on-board computer function keys
Switchover button for unit changeover
Acknowledgment button for check control
4 buttons for digit entry and input acknowledgment button (set/reset)
Steering drop arm for remote control

MID Function Displays:

The MID contains the following driver information:
Check control
Memory function clock
Clock/date indication
Two average consumption values
Outside temperature with ice warning
Average speed
Distance (distance to destination and expected time of arrival)
Range
Speed limit
Timer (when equipped with independent heating timer, otherwise stopwatch)
Coding function (antitheft: Monitoring front lid, radio, drive-away protection)

Diagnostic Procedure:

The MID is connected to the instrument bus. The diagnostic procedure of the MID is therefore performed via the EKM.

Special functions of the MID:

Similar to the instrument cluster in the E 32/34, the MID displays check control messages.

When a check control message is indicated, the on-board computer functions can be briefly called by the push of a button.

CC messages of lower priority can be canceled with the CC button integrated in the MID keyboard.

In this case, the two triangles on the left and right of the display act as a reminder that there is a defect and also the "+" sign when more than one message is pending.

Priority "1" defects cannot be acknowledged.

The two triangles flash. The unit of a BC function can be switched over with the km/mls button.