I do not recommend switching to 134a. I did it on my 300SD a couple of years back and hated the performance. This coming summer, I am putting a new compressor on and switching back to R-12. More expensive freon= better cooling, less expensive freon=insufficient cooling--especially in a Mercedes.


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Rgds,
Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
'67 250SE Cabriolet
'77 450SL
'79 6.9 (SOLD)
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8