Replaced the evap on my 1990 300E a couple of years ago. Now, I have a big leak in my 1991. Topped it off (R12) two days ago and last night it would barely cool - heavy stream of bubbles in the sight glass.

So, I'm hoping maybe it is NOT the evaporator this time. Haven't yet tried to find the source of this leak.

What else tends to leak on these cars? Over the years I have had a compressor, expansion valve and evaporator leak in various 124 cars.

What's your experience? I wonder what percentage of time it is the dreaded evaporator.

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2012 E350
2006 Callaway SC560