I'm looking to buy an '09 or '10 TT and was just wondering if the model does not have the xenon head lights, if it is possible and expensive to add these in afterwards?

 

The 09-10 TT come stock with Bi-xenon Projectors, options are LED's or no....Price to add LED's later will be $2500+ from the dealer.

 

Ok, that's what I was looking for, the LED's. Is there a cheaper way to get these done outside the dealer?

 

You can try and find someone across the pond to source you a set...other then that theirs a bunch of aftermarket made in China options, reliability wise though its not that great.
I do know of a forum member fly300kts who makes his own LED headlights he can probably help you out with his expertise...just search his name and PM him.