Originally Posted by
M60A3Driver
That is called a "Duo Valve" or "HVAC Heater Control Valve".
Here is the Mercedes-Benz part number: 0048302084
Here is a link to one, you can search around and might find one cheaper.
Duo Valve HVAC control valve
They also sell a repair kit on amazon. That would be the cheapest way to go.
Holy Shat!!! $580....they was smoking something pricing these...that link u sent won't open...man...I'm screwed..lol