Hi all! My A/C on my '87 300E quit working. Evacuated system to -25 inch @ ambient temp of about 93F with 70% humidity. Held for 30 minutes. I charged it to 35psi with R12. Clutch engaged. Pressure readings: low side 35psi, high side 35psi. It's obviously not pumping. Is it "Black Death" or could something be clogged enough to cause this? There is a noticable leak behind the expansion valve (lines are wet with oil). I am sure the evaporator needs to be changed. I took the dryer off and blew compressed air through it with a white cloth to catch anything that may come out. Just a little oil, nothing that looked like teflon flakes (unless they look like oil or powdered graphite). Where should I look next? Thanks in advance.