To original poster Benz300
Any update on your '87 260E AC problem? My '88 260E didn't "act up" at all yesterday. AC was fine and outside temps were in the high 80s. Highway, city, and inbetween were all OK. I won't continue troubleshooting until the problem rears its ugly head again...but I have full confidence that it will return, probably very soon. Maybe together, meaning with the continuing help of experts on this forum, we'll get our seemingly identical problems fixed.
If anyone has any experience on that "fluid loss" question I had earlier regarding removing the monovalve, I'd appreciate any input.