Originally Posted by Merccossie

If you have compressor failure the contamanation is likely through out the system and flushing is not going to remove all the debris. Eventually the replacement compressor will be compromised. I have four w201's all with working AC. Three on 134 and one on it's original R12. The smaller molecule size of the 134 will allow it to leak from a lot of places I think over time it slows and eventually stops at least that's what happened for two of my cars. I am here in the south so AC can be worked hard and the 134 is defiantly not up to the task in sitting and slow moving traffic. I am keen on the ES 12A, annectodatoly I hear it blows snowflakes sometimes.