that's exactly how my A/C behaves. At times I can drive all day with the A/C on and it works fine but at other times it'll just shut down and I have to switch the car off and then on again in order to get it working. Does this mean that the sensor is bad ? Where is the sensor located on the 190e 16v, and how can I test it ?
190E 3.0-24v (M104 980) turbo @ 0.8 bar
1/4 mile: 2.483 / 13.540 / 175.17 km/h (street tires)