I have a Highline with 18 inch Continental 'ContisportContact 5' tyres which have a product called 'Contiseal' inside. I had no idea about this until I had a puncture, and it is not mentioned in any of the VW literature that I could find.

ContiSeal™

I recently hit a piece of wood on a dark road and picked up 2 screws in a front tyre. The TPMS system picked it up pretty quickly and I had to change to the spare. When I took the tyre to the tyre shop it appears that the seal had worked with one of the two holes, but the larger one still had the screw in it so it was bleeding air quite fast. The problem is, according to the tyre shop, that the sticky goo on the inside of the carcass can't be cleaned up sufficiently for a plug to stick to seal the hole if the proprietary sealer doesn't work.

$240 for a new tyre thank you very much!

I don't know if all Tigs have tyres with the same technology, but tyres with it have a small 'ContiSeal' logo just near the rim at the point where the '...Contact 5' appears on the sidewall.

Hope this helps.