I'm trying to figure out how cold my AC should be and was wondering what other have for Evap temp values, or vent temp with a thermometer.

I was having trouble with the poor cooling and wildly fluctuating high side pressure. I replaced the TXV and drier, vacuumed the system and put in just under 36 ounces (I know a its a little overfilled) or fresh 134a.

The evap, and both heater core temps are all in the low to mid 50's F. The high side pressure is back down to 8 on the highway and up to 15 in traffic. No matter what I do I cannot get lower then 49F evap temp. The compressor is not shutting off and the low side pressure is 38-42psi, and nothing seems to effect it.

I just moved to DC for the summer and really want cold AC.

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1998 Mercedes E300TD

1983 Mercedes 240D Turbo, 131bar injectors, Cosworth intercooler and 63' Ford Falcon radiator, Ardic Parking heater, Headlight wipers, Best 38.6mpg.

1973 Saab 96 Rally Car, 1.8l V4 with all the race bits