.....while the topic is still fresh. What type of refrigerant is/was used in the 126's, specifically a '91 300 SE ? (fingers crossed for 134) Mine isn't working but was last year, I've known this car and the previous owner for about 3 years now.

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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)