I just have decided to change my spark plugs on my Vision 3,5 TSi. I live in Czech Republic, so the offer is quite small and furthermore I dunno the exact designation of the plugs, for example... Platinum Gold. Dont you know, guys, which spark plugs EXACTLY i have to install?
Anything but platinum plugs will work great. The first gen 3.5 doesn't like platinum plugs. Save your money and get cheap copper plugs. They will out perform a plat plug, and are cheap, you just have to change them every 3 oil changes or so.
You might want to PM EagleVision993 with the question, as he is in Germany. Its not too close to you, but he could probably either send some to you, or help you with a place to get the right ones for your Vision.
I posted it in an existing thread. I'm too lazy to look it up right now but it is really simple. Much more simple than replacing the water pupm that I just did. But yes, if you do a search for "autostick" in the first generation forums, it should be one of the earlier posts.