1992 Mercedes 300TE

Recently, the A/C compressor started leaking freon. I

bought a new compressor and had it installed by a

qualified mechanic. Now, I am only getting around 60

degrees vent temperature. The compressor checks out

good, ie, low side pressure at 1200 RPM is 28-36 PSI. High

side pressure is 225 PSI. The mechanic says the expansion

valve is functioning properly.

Before the compressor was replaced, the vent temperature

was around 45-50 degrees. (The system has been converted

to 134 several years ago) He did NOT replace the dryer -

he said there was no need to.

He doesn't seem to know what's going on and, of course,

neither do I.

Please help.