I have a 2014 C300 4matic. The AC stopped working and was just blowing air. I noticed that when the cooling stops that the "red" light of the AC button on the AC control panel flashes like 3 times and goes off. Pressing the AC button does not turn the AC on again. I took it to a dealer and compressor was detected as being bad. We have changed the compressor + condenser and it worked very well but only for 3-days. However, this time, the red light on the AC button does not go off, it stays on but the cooling trips off and on at no defined intervals. I selected the coldest temperature to make sure it is not thermostat regulation, but still it continues to trip off. Finally we changed the compressor a second time and it worked only for 1-day and started the intermittent cooling and tripping off. Please could anyone help me to give an idea of what might be the problem?