Hi I have got r320 cd1. Overnight my car used to drop. In the morning it said wait briefly. It took 2 minute to fully rise. On Sunday it was took over 6 minutes. I took to garage they changed valve block and rear right airbag. It kept cutting off. When done diagnostic check it said check rear hieght adjuster for airbag. Replaced that. It still does not rise from rear. Compressor is running and says visit workshop.