How to learn SDconnect C4 from LED displays


This is for those with MB Star diagnosis SD connect C4 multiplexer. will explain a lot about LED display with message, buttons, icons on the diagnostic system.

Display, buttons and icons:

The display is divided into two. In the upper area, permanent icons are shown (see following figure).

In the lower area, details are shown during the call up of information, setting of SDconnect C4 parameters and during the diagnosis.


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LED and acoustic signals

In the following table all LEDs and acoustic signals are shown together with their meaning:

sd-connect-c4-led-display-2 sd-connect-c4-led-display-3

Information in the display

Information buttons


Function keys


SDconnect C4 operating condition


MB SD Connect C4 images:

Wired connection


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