I have a 92 190E2.6 with 138,000mi. When sitting in traffic or parked and idling on hot days, the ac stops working until the car is back in motion and has cooled down. When this happens, the engine temp is just below 100C. I have bypassed the MAS module and also bypassed the climate control engine temperature by installing a fixed resistor into connector to simulate a cool motor. I have also recharged the system as it was a little low. Aux fans have been wired on low to increase airflow at idle. I have not bypassed the refrigerant pressure switch yet. Any ideas? My wife and kid are sweating in the afternoon shcool pickup line.

Rod