Hi, I have a 1994 W202 C 200. My AC works fine but after about 20 mins of driving the EC button lights up and my compressor stops working, during this instance only the blower works. If I manually press EC again the EC light goes off and the compressor restarts and the AC will work again. I can repeat this about 4 times after which you can no longer switch EC off manually. At this point, you have to completely turn the car off and on then the EC goes off again and the AC works. I am very frustrated with this as I can't find a solution anywhere. Please help!!!