Thanks for the info guys. I'll pull back the carpet next week and take some shots of the UV dye I can see on the corner of the heater box.

I would figure either way though it has to be leaking...If the expansion valve is not, where else does the dye come from?

The only thing he mentioned about the running of the A/C was that it was not as cold as it should have been. He said the low side was 50 (psi?) and the high side was 200 (psi?). He mentioned it could be a clogged expansion valve. Seeing as I will be getting a new one anyway that would resolve it, but any thoughts on other possible causes?

There was a very, very minor sign of residue on the compressor...Are there seals that can be replaced or is a new compressor needed?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k