Hello everyone, welcome to @AutoScholarwithMrB ! Is your power outlet not working in your Tiguan? It is most likely the fuse! Unfortunately, the owners manual doesn't tell you where the fuse is. By watching this video, I will show you exactly where it is.

The 12v outlet fuse can blow due to the adapter being faulty or the item you are using could be pulling too much amperage. Never replace the fuse with a higher amperage fuse. If the 20 amp fuse repeatedly blows, it could be a problem with the wiring and further testing is required.