Avoiding roof corrosion?

[smurfo]

Yea, I am part of the club now..

 

[Viktorgeorge]

Yea, I am part of the club now..
View attachment 142275

Hopefully you caught this early. The full string above tells you all you need to understand what needs to be done. Be wary of VW technicians, they don't all understand the problem, so you should, to manage the solution.