The most cost effective and elegant solution (for my TSI w/o maps and more dock) I have found was to buy a magnetic mount and position it where the original mount would be:
If you decide to go with this option it's very important to buy a mount that swivels 90 degrees in to the vertical (as depicted in the upper image).
The adhesive seems to be quite good and the phone didn't even move by a bit while driving very aggressively.
Here's a link to the product I have used (no affiliation whatsoever):
Smarter Shopping, Better Living! Aliexpress.com
de.aliexpress.com