Thanks Tiggy12 for sharing your experience. Unfortunately for me, engine flush and oil and filter change didn't work in my case, so I showed the car to VW, they diagnose wrong oil pressure in the variable timing system, so they change all: 4400$!
But I think I don't have choice, let's hope after that it will be reliable...
But I think I don't have choice, let's hope after that it will be reliable...