The low speed on the aux fan is not working. If I unplug the blue connector from the thermostat they don't start either. I did change both relays in position B and C and the resistor behind the headlight. Now if I am touching the wires from the red sensor on the receiver dryer the fans are starting. There is another sensor on the dryer (black) that I did not touched. What it should be. Then if I will need to change any of those two sensors I will need a full recharge of the system? Thanks guys

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New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru