1994 Mercedes Benz S420 Base 4Cyl3.9L - Engine
I have added r134 to proper pressure. AC blows hot air through side vents and cool air through the center vents
vehicle is a 1994 s420 with approx 120000 miles. Engine has been swapped out previously for a 400E engine.
Recent diagnosis of check engine light called for a coolant temperature sensor that has been replaced.