View Full Version : Headlight Lense Deterioration

07-26-2009, 10:17 PM
Preparing the van for my next trip, I noticed that the plastic lens for both headlights are showing star patterns. They are all located in near the main focal point of the headlights, so I am wondering if it is heat or wavelength related. It is not lens fracture from trauma, as both my lenses are covered with 3M protective film. I have seen older Mercedes in the neighborhood with really bad plastic headlight lens deterioration - but they look foggy and yellow. As can be seen, there is no yellow and seems more crystalline.

Any ideas as to what is going on and prognosis?




Altered Sprinter
07-27-2009, 12:53 AM
If I read your post correct, it appears the 3M film is de-laminating under expansion and contraction, as to heat variations cold hot the film may have a limited life frame before degrading.

07-27-2009, 11:22 AM
It definitely is something happening in the interface between the film and the plastic head light.

Altered Sprinter
07-27-2009, 11:45 AM
:hmmm: I thinks there's a connection

Head lamp crinkle, with severe circular white discolouration on the bumper

and a toupee makeover:thinking:


Suspect acetone.:professor:
Reminds me of an acid etch wash