my heater blows hot on the passenger side and cold on the drivers side. what could be the cause?
The problem could be the duo valve but if I remember correctly the W203 may not have one. The next possbile issue is the vent acuators that direct the air flow. They can get stuck or break.
Do you hear a click click click noise under the dash when you first start the car?
no, no sound at all
Your problem is either the acuator under the dashboard that control the air flow or the heater control valve.
thanks. someone said it might be low on freon but i don't
see how that would effect one side and not the other
I don't see how that could be the problem.