Trust me get them cleaned
my headlights are foggy (the clear casing) on my 99 540 and i searched but couldent find anything im debating on weather i should just get new ones or if i should clean these and how i can go about doing it..
also i was thinking i wanted to change the headlights, side markers and taillights to the 01-03 (clear signal) lenses but i heard from someone that they were a little diffrent from the 99 version any help is always appreciated
Its funny cause I encountered the same thing last month. However, I got my headlight crystal clear with the meguiars headlight restorer. It cost me 24.99 but was well worth the money. I believe it came with a drill compatible bit ( with a yellow wool polisher attached) plastic ( blue in color) restorer polish, and small microfiber towel. All i had to do was spread the polish on to the woll polisher in a pea sized amount to avoid splatter, and began to work the polish in till almost gone. I then buffed it off slightly with the provided microfiber towel and applied the meguiars Carnuba wax .The results came out much better than I expected as I was too considering replacing my whole entire lens. But then the only other option would be to get the clear ambers which I didnt like. So I would be left with getting a whole light assembly ( with angel eyes cause I was gonna make an investment in headlights why not go big

. Anyways i ended up putting some CCFL angel eyes inside my original headlights and I love the clear and crisp look.
Sorry about the long rant, but I just wanted to share how this product ( meguairs headlight restorer) really turned my options around. I'll try to post a pic to show you the clearity.