I had the same exact problem! here is a video
http://youtu.be/tq-_q_gI1ug The dealership said their hands were tied because I was out of warranty although I had been in over 5 count'em One Two Three Four Five SIX! Flippen SIX times with in two years to replace a bulb. driver low, passenger low driver high, passenger high, tag lights!
The dealer I went to was never much help while I was in warranty
They would just replace the bad bulb and say.......
Dealer: ummm duh we fixed the problem duh
Me: well what was the problem?
Dealer: ummm duh the bulb was burnt out duh
Me: but what caused it?
Dealer: ummm duh light works fine now -be on your way until you are out of warranty
Me: No you just replaced the bulb, why in GODS NAME did I loose not one not two not three or four or five but SIX Mother love'n bulbs in less than two years?!?
Dealer: ummm duh, your bulb was burnt out duh. its fixed now. -be on your way until you are out of warranty
Yea that was Winner VW of Dover in Delaware.
So I took it up the food chain to VWoA. I brought up the safety concern of a rear light being out and at first VwoA wanted nothing to do with me saying.....”umm duh its an electrical problem it could be anywhere duh and you are out of warranty. To which I replied well why wasn't it fixed at any one of the last SIX times I brought it in while it WAS under warranty? So then I said the “L” word......litigation and I started to hear from WvoA well do you want to go to another dealership? I agreed, the new dealership would be Garnett in Pennsylvania they too were stumped but then I got the gremlin on tape, well not tape but video (which killed the radio star I might add) The tune changed completely, “Mr Smith, here is a complimentary loaner until we have the problem resolved.” They fixed it. So far 5 months and I >knocks on wood< have not lost a bulb.