I have a 1982 240d, 4-speed car that is now running hot with the A/C on. The temp nears the 120 mark at idle and at low speeds in traffic. It does cool down on the highway after a while as long as I keep it above 50 mph. I jumped the aux fan at the motor and it runs fine, but I'm not sure if I have more than one switch activating the fan (A/C pressure, 212 switch). I don't see a switch near the thermostat housing with an electrical lead wire, only a switch with two vacuum lines attached. Is there a 212 switch on this model? How can I test the A/C pressure switch to check if the fan is turning on when it is supposed to. Yesterday, while it was running hot at idle with the A/C on, the fan never started. The ambient temp in Las Vegas has been running around 105 so it is pretty hot anyway. Someone please point me in the right direction. Thanks