My a/c system is leaking freon - about a pound every 10 to 14 days. I put the UV dye in a few days ago and went hunting with the blacklight tonight - I didn't find any direct evidence of the leak, but the water coming out the a/c drain pipe had a significant amount of dye in it.

I thus deduce the leak to be in the evaporator. Am I correct? Could it be some other component in the dash? Is there any easy way to check without spending the 4-5 hours necessary to take the dash completely apart?

The car is a W124 (93 300E 2.8)

Thanks