Thanks Yuri, my Syncro is starting a gain. All perfect. Many thanks.
Now I realized, that my "new" OEM Burptank (Big in and big outlet 2.1 WBX) is getting white spots and cracks all over the thing. One little drop is coming out when pressure is on the system. It's not even 1/2 year old. Does anybody has a genuine Volkswagen Tank in good condition lying around for sale?