MERCEDES S550 HEATER CONTROL VALVE REPLACEMENT, NO HEAT W221

Hi guys this is the video showing you how to replace your heater control valve on your Mercedes W221 S550 and other Mercedes Benz models. If your vehicle is blowing cold air and your a/c works and coolant is topped off there is a good chance that you heater control valve needs replacement. The Mercedes Benz part number is A 230 830 00 84. Don’t pay the the dealership or anyone else 4 hours of labor when you can do this yourself in less then an hour.