Composition Media for Composition Touch replaced after defect, now no PDC display more VCDS

Dear community, I hope someone can help me. I have two VW Caddy 4. Both built in 2016. Let’s call them simply Caddy 1 and Caddy 2. Caddy 1 has original built a Composition Media (5K7035200D), Caddy 2 a Composition Touch (1K8035150D). Unfortunately, the Composition Media of Caddy 1 is defective. I had to swap, identical replacement was not to be procured at fair prices (> 500 EUR), so I bought a Composition Touch (1K8035150D) for 130 EUR, built in and at friendly for 50 EUR unlocked (component protection removed). I bought the Composition Touch, because VW installed it in exactly self-equipment yes in the Caddy. I now even have a Caddy with this radio. The radio works in Caddy 1 now fundamentally also. Radio, Bluetooth, everything in order. I had to have the two rear speakers activated via VCDS, because in the dispenser vehicle (T6) only 4 were coded and also this worked. However, the display of the The distance between the PDC sensors at the rear (no one is installed in the front) used to be with the Composition Media, but it was also possible in Caddy 1 and Caddy 2 with the Composition Touch, which is now also in Caddy 1, too. Caddy 2 has exactly the same radio with its own part number and both have PDC at the rear, but the radio no longer shows PDC display when driving backwards. If you set the reverse gear, only the display for input is locked and the piper gives acoustic (pas send) signals. To do this, the loudness is lowered. Automatically with inserting the reverse gear. And now you’re sure to think immediately: Does he just have to encode the type? What’s the problem? The problem is that I already had it encoded. (picture attached) The appropriate setting is already activated. Further meaningful codings are not to be found. The coding looks identical. We’ve gone through everything. We even once have the entire encoding of the infotaiment of Ca ddy2 copied to Caddy1. The parking distanceassi coding was the same before. What could that be? What could we have forgotten?