2000 306 xr bnzn autom.-Heater Radiator

I took it to the service with the problem that the boiler does not blow hot.

They said that the radiator is missing water and that the button on the panel should not change either, but should change.

They said it would cost about 600.

I have the idea to take away the parts and pay only labor.

Where can I find these pieces appropriately?
Or what would you suggest?

I would like to find the fitting parts of my fellow samsunlu heater radiator 70 tl link below. the price is expensive because the link is removed from the chest completely bro sonerkyl 2017-10-03 09:46:13

the wire of the adjustment button on the control panel has been removed, and the heater core has changed. the chest is completely removed.

I took care of 450 in total.