Thank you for your suggestions. I don't see why I have to replace the entire system for one part! So after a long search I found the solution

I know some people want to make money, but it's just not right to rip people off like that. It's no secret that manufacturers have similar or even the same parts made by the same suppliers. I came across the same nozzle from VW and was able to remove the part in between. Admittedly, 40 euros is expensive, but it's still better than spending more than 140 euros
Nur ORIGINAL TEILE von VW, Audi, Seat, Skoda, u.s.w. - KEIN Ersatzbedarf. Ein Teil von uns.
www.ebay.de