I know Mercedes mechanics dont like the idea of using inexpensive parts, but a new R4 goes for $300 and a rebuilt at Pep Boys (where else) goes for $128. Pl remember that all the switches O rings etc will go another 120 during the R134 conversion. I know it makes sense to get the new AC compressor because this is a great 83 240D with a brand new engine, but unfortunately I spent some 2500 rebuilding the engine last year and I'm also rebuilding a 300 CD Turbo this summer. Can anyone offer me any advice as to whether or not to use a rebuilt AC compressor? http://www.jersey.net/~rtc/240D