w220 ABC Problem

Hello municipality, I am just on vacation with my w220. I parked the car yesterday evening and today it is suddenly wrong. At the back right it is very strongly sunk down. If I then pump up the car it will also be right at the rear, but still remains lower than on the other wheels. Do I now have to calculate with a broken valve block at the back? Should it cost around 1500€ in Germany? What should I pay attention to, what should be checked in the workshop, because I I’m just in Turkey and I want to be careful that they don’t knock me out. I also doubt that they have experience with ABC drivers. ?ch am The car didn’t drive a meter since I noticed that. It’s probably better not to move the car until it’s repaired, right? ?ch was riding the bike over a big stone last week, with my rear right tyre bursting (40€ for 2 new ones paid, scotch cheater). What else could have been broken? Can someone tell me how to check this bar? (have experience in screwing, unfortunately not with mercedes) Since I am on vacation, my location is a bit awkward, since I don’t trust the factory staff here. If someone could give me a tip here, I would be very grateful. With kind greetings from Antalya.