I've traced it before with all the bottom fairings off and IIRC its two distinct red and blue poly lines from the compressor tee. I'm 99.9% certain......whatever it is its friggin' weird. I still have my Cayenne for a road trip tomorrow to HOU but I hate working without a lift in the heat. Oh mosquitoes galore as well. On a positive note my tranny pan is not leaking nor is the mechatronix sleeve as BMW stated BOTH needed replacing. My Indy made a house call and was like " total BS, unnecessary..."

Dodge one bullet and ya catch another. Now that I recall I did not use the new valves from the new bags, nor the "hats" that came with. I guess nows my chance for new everything.....

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2010 Specialized Epic Carbon Comp XX
1976 FJ40 Toyota Landcruiser (SOA,350ci sbc V8 crawler)
2007 X5 4.8i
2008 Porsche Cayenne Turbo S