My 240D was converted to R-134 at the time of the engine swap(2001). It
has been working fine since the swap. Turns me into a happy popsicle in
the summer. The only problem that I had was a leak just after the swap.
If I remember correctly, it was one of the lines that had not sealed
properly, though it has been a few years and I may have that wrong.
After that was repaired, and yet another NEW $*%&# condenser, it has
worked perfectly. I just wish the mechanic had pressure tested the
little beast before he filled it up with the R134. When the system was
opened to repair the leak, the I had to replace the condenser, since the
mfr. wouldn't warrantee the part otherwise...even though I had just had
the first new one put in less than a month before. Grumble, grumble.