03 Jetta TDI Wagen small radio knobs split and fell off. VW dealer refused to warranty a radio. Owner(me) was not happy. Drivers door power window switch quit, dealer replaced it, 4 weeks later quit again, dealer said I'm on my own, car was still on warranty. Seat heaters that worked had to have a recall done to them, recall was done, seat heaters don't work any more, dash panels not completely reinstalled following recall. Sales folks at dealer used to call periodically looking to sell new cars, but not any more. Dealer service dept sends oil change specials periodically, I stopped there this spring and asked the parts man to show me the engine oil that they use in an 03, 04, 06 TDI Jetta, one container type for all three, but not meeting the 03 spec.
TDI.com started stocking the small radio knobs for my 03 this spring, if you contact them about the 06 knobs they may be able to do something about them.