The Gates heater control valve is an electric coolant valve for Mercedes-Benz E350 V6 3.5L models from 2006–2011; this listing notes the valve on the cylinder head. It replaces the heater control component that manages coolant flow to the heater core and supports proper cabin heating control. The valve is supplied for the explicit Mercedes-Benz application and years cited.
Gates 06-11 Mercedes-Benz E350 V-6 3.5L Heater Control Valve On Cylinder Head Electric Coolant Valve