1983 300D Turbo, previous owner says it was converted two years ago to R134A, but I can't find any documentation. I want to check freon level and add if necessary, but don't want to mix R134A if it has R12 in the system. How do I find out what is in it? Also, I noticed from other threads that when converting to R134A, the condenser should be replaced too...where is it and how do I know if it was replaced?
Thanks in advance!