I needed some help in finding out if my C220 Thermastat is still working properly. My car is also losing coolant and requires topping up every 10 days. I was wondering if anyone could help give me some tips on figuring out if the thermastat is fine. Where's it located on my car? and is it easy to change? Like the RAD hose that leads to the rad, usually their are pressure filled will coolant, mine can easily be squished and their is little coolant you can usually feel inside. Anyone know what's going on? and where my Thermastat is.

Thanks guys.