Hello, from the very beginning I play with the idea to darken the windows from B-pillar. I know 3 possible systems. 1. Volvo grid inserts for side and rear window Advantage: Detachable in winter Disadvantage: The rear windows can no longer be opened, or only at low speed. 2. Solaplexus solution http://www.solarplexius.de/ same advantages and disadvantages as solution 1 3. In the specialized shop disadvantage: Can not be foiled in winter Advantage: The rear windows can be used and I can choose the tint intensity. But now the questions about the 3rd solution. Can one really open and close the rear windows without any restrictions, or is there a risk that the foil will remain hanging or even tearing? What costs do I have to calculate for a folation from the B pillar? Can anyone recommend me a dealer in the Aachen or Duisburg region?