I switched to an Aftermarket HID 5000K kit last year and the stock projectors on the New Beetle's are fine and work well with the HID Kits. No blinding people. Looks perfect to me and I have never been flashed by oncoming traffic.
I just left the High Beams stock. You can still use them.
I did get a Euro Switch and I did disable the DRL's so it wouldn't but a drain on the HID bulbs. For DRL's I use my foglights during the day without any Headlights. Easily done with the Euro Switch.
The HID's look GREAT and I hope the bulbs last longer than the regular Hallogen bulbs.
I didn't really want to use the stock projectors.. the beam pattern is what I'm questioning. Most halogen projectors are not designed to spread HID lighting properly. So while blinding oncoming traffic isn't so much an issue, the whole point of me doing this is to be able to see. Kinda useless when the light distribution is wrong, the foreground is over-lit and I can't see into the distance.. if that makes sense.. I did try a drop in kit for a night, and took it out the next day. It was alright, but I'm very picky and wasn't satisfied with the way it looked.
I have a euro-switch with disabled DRL's as well, only issue is that since using my fogs more frequently, the wire coming off the ignition switch to the load reduction relay is turning really brown... I think I need to rewire the fogs to somewhere else before it fries my ignition switch.
Oh, which reminds me.. WIRING.
I can't seem to find a decent answer.. I've had a brand new headlight in for maybe a year (DRL's disabled since about 4 years ago) and when I went to put the drop in HID kit in, I discovered the coating is ALREADY falling off the wires.. For this retrofit, I'm getting 2 brand new headlights and I do not want this to happen. Are HID's harder on the harness, because obviously halogens are doing a number on it. What would be a possible solution to this? Maybe piece together my own harness with a thicker wire? What can I do to keep the stupid thing from frying?