Hello Zeke, Knowing the leak was in the cabin, I probed the drivers side under dash until leak detector alarmed. Removing part of lower dash and driver side kick panel, led straight to TXV. Fortunately after replacing TXV no further leaks were found. I might be tempted to recheck the area near the TXV. Maybe the refrigerant is migrating up to the vent areas. I am not familiar with your model. Maybe there is a way to get to the evaporator compartment to test. On my car (560SEL) it was not feasible. It has an air bag where you would normally find a glove box.Good Luck.