Have an '88 420 SEL, which I purchased about 14 months ago.
Over the weekend, I put 2 cans of R-134A into it. Simple. No hassles. Car seems to cool better and faster, especially noticeable after sitting in the sun at midda. (which it would take much longer, before).
My question: This car may very well have an old freon-based (R-12) system. I don't know. Although what I did may not help-out all that much as per the cooling, was putting R-134A particularly harmful? I don't think so. Just would like some feedback. Thanks.