The headlight lenses on my 2008 E350 have become cloudy. It seems like there is a film on the surface. I have not found a method to remove it. Perhaps the acrylic material has degraded.

My dealer says they do not sell the lens alone. I must purchase an entire headlight assembly.

Any suggestions?

 

one of my headlights fogged up during a wash recently , but it disappeared quite quickly (still, this should not happen..?)
but guess your problem is permanent, IE not a water issue?

 

This post is best answered in the W211 forum.