Stan,
Thanks a lot for the info, I was guessing that the pressure in my A/c is not enough to engauge fan. I am intending to have it checked and serviced. It is a 1990 190E 2.6. One of the switches at the drier is partially red plastic. WHich switch is which and which one can I replace without losing all the r-12 and which one can I replace. I guess it might just be best to replace them both when the shop does the service and replace all the r-12 them huh. Thanks. I did replace the fan resistor last month. I want to replace the thermostat this week just to be sure all is good. I can get teh fan to go to the hi speed be jumping it so I know it works at that speed, the system just usually doesn't engague the hi speed.

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red