 I loved my VW Beetle, right up until the roof started leaking and ruined the leather seats and headliner.  VW says its not thier fault the drain line plugged up.  Unfortunately there is no way to know when it is plugged up, nor can I service it.  I asked the dealer he said he had a dozen VWs sitting out back with the same problem. I asked him how the ones out front "FOR SALE" are kept from leaking.  He said, sinple "We just don't drive them and never open the windows."  Volkswagen of America has claimed again and again that this is not their fault.  I definitely will never buy another VW.