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Discussion Starter · #1 · (Edited)
Hello,

Has anybody been able to connect an external video monitor to the 25-pin rear connector of the COMAND APS?

I'm referring to the 2nd connector on the back of COMAND-APS which is for a rear (aux) screen connection.

The EURO spec COMAND APS unit has 4 connectors on the back:
1 - Green FAKRA - Video Input (only if Video capable)
2 - 25-way D-Type - Rear Screen (only if Video capable)
3 - 3 Way - AUX audio input
4 - Multiway - Power, Ground, Wakeup & MOST fibre plug

Here's the Pin-out for the D25 (Rear Screen) connector:
1 Ubat+ (circuit 30)
3 AUDIO R
4 AUDIO L
6 CAN Low
7 CAN High
8 CVBS (FBAS)
14 Circuit 31
15 AUDIO screening
16 AUDIO ground
20 AUDIO GND CYBS (FBAS) ground
** All other pins are not assigned

I tried to connect pin 8 (CVBS (FBAS)) and 20 (CYBS (FBAS) ground) to an external Sony monitor video input RCA connector (Video Composite signal) but the screen just goes black.

At first I thought I would have to activate this rear screen output on the COMAND using the MB Star Diagnosis computer so I asked an MB dealer to activate it for me (Menu - Rear Entertainment). But still no luck :confused:. All I get is a black screen when the DVD starts playing (when anything else is playing other than the DVD the external screen stays blue)

Has anybody tried this?
Any idea why it doesn't work?
Can it be that this 25-pin connector only works for the Mercedes’ OEM rear screen which probably makes use of the other signals (CAN Low and Can High)?

I really appreciate anybodies' help on this.

Thanks,
migabc
 

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