parking sensors no longer beeps, how restore changes?

[Tino123]

In my 2016 Kuga, I changed the AHU for an AHU with DAB 2 years ago and also upgraded the Sync 2 to Sync 3. So far everything has gone perfectly. As of today, however, the rear speakers are very quiet and sound muffled and the parking sensors no longer emit beeps, but the Sync 3 displays the distances between the sensors correctly. But I can no longer find which setting I accidentally changed in the APIM or the AHU (ACM). The AS-Built from Ford probably doesn't help because I've upgraded a few things? Did someone have the AS-Built for me from a Kuga built in 2016 with Sync 3.4 (2019 APIM) and an AHU (ACM) with DAB with the number CV4T-19C107-NH for me to compare?