Took out the compressor and drained it. Put back about 20-30ml. Did not flush. Now that you said it - How do I flush the system? I would definitely want to.

The car is an 85' 300D (W124) Euro. Freon is R12. Compressor is rotary type NIPPONDENSO for MB.

So after I flush, is it safe to put back 7 ounces?

Thanks!

Francis