w126 Climate Control A/C Charge

[Anthony Cerami]

1990 300SE,
Hello All,
My 300SE has been converted to 134A some time ago. As is typical on these 126 models the air system does not seem to cool very well.
In this car at 80 degrees outside temp. the pressure reading on the low side is 35 psi and on the high side it is 205 psi. This seems to be in range...please correct me if I am wrong.
Out of the vents however it blows about 80 degrees. If I switch the blower to low I do get a drop in temperature to about 75 degrees.
If I re-circulate the cabin air there is no difference....in temperature.
Can some one please advise?
Are the pressures correct?
What can I do to trouble shoot further?
Thanks