It is not possible to adjust a reflector housing (that was not designed for HID such as Mercedes) so that it will not produce dangerous glare.But do your self, and even more important, your fellow drivers a favour when the HID's or LED's are in; check and adjust the beam so you can't blind up coming traffic. The lens shaped head lights are perfect for HID's or LED's but new light sources have a nother light spreading, so this needs to be adjusted.
OP has a base USA model 2007.About stories that the 4.3 projector head units which should not be used for HID Xenon I can only say this is half true.
It's a matter of buying a quality HID Xenon set, and re-ajust the projected beams so it can not blind and gives no glare.
The plastic mirror inside the projectors will survive HID for sure as they do not become as hot as classic halogen lights.
this is what my HID projector retrofit produces....Hi guys first post here as a member!! I was wondering if you could help me decide whether to get HIDs or LEDs for new headlights as mine are very dull now? I have an 07 base model 4wd. I drive at night a lot and down some poorly lit backroads!