I find the Autoglym Leather care balm just sits on top of the coating on top of the leather. This just makes it really shiny. I use Autoglym leather cleaner and a paintbrush to rub it in. I wouldn't recommend the Autoglym stuff, it just becomes shiny in a few days. Going to try Meguiars next.
Leather care balm would work wonders on high quality leather, but it doesn't do much for the leather in the VWs.