[A190_BR]

hello, I registered a few days ago, but I already knew the forum. I'm from Brazil, I have a Class A A190 gasoline. It is leaking coolant, but I do not know if it is in the thermostatic valve or the head gasket. Or, the gasket is moist why coolant drips to gasket. and because it is made of steel, and has a fillet that you can see, it makes it easier to moist? I verifying this car cold, after two days without starting.
I need replace the total valve (have housing leak) or housing gasket?
(here at the mercedes forum brazil, people don't help much. For us Brazilians, parts of the class a, cost high.)

 

[A190_BR]

There is another problem, I made a video of the engine running (water appears from the leak in the video). It makes a noise at first, like a "zum zum zum"stop after. And, that loud noise is where the poly v belt is. Is it just belt and bearings?