[XuLeTZ]

There is no direct connection between reverse camera and IHKA, however it is possible that the new IHKA module is killing signals on the LINBUS which the camera needs. You need to correct all the wiring to accommodate the new IHKA in the first instance.
Just to prove a point plug in the original IHKA and see if the camera works.

I think will try first the wiring this afternoon Wiring is easier for me than taking the glovebox off again and plug the old IHKA.
Thank you once again.

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There is no direct connection between reverse camera and IHKA, however it is possible that the new IHKA module is killing signals on the LINBUS which the camera needs. You need to correct all the wiring to accommodate the new IHKA in the first instance.
Just to prove a point plug in the original IHKA and see if the camera works.

Only need 2 wires for new IHKA3, from KCAN to KCAN2 in FEM and it should be good. Will kick in ISTA as well and see what`s going on in the car's mind.