LoveLee,

Not before, after. Actually the system should be thoroughly flushed out after a compressor failure, the compressor installed, and then the entire system evacuated, leak checked, then charged. The repair should also include a new filter drier.

Good luck,


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Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles