I purchased a "Kat's" circulation tank heater for my 1995 Mercedes E300.
The instructions say to mount the heater near the lowest point of the engine, put a tee in the lower radiator hose and run a hose from the tee to the bottom inlet on the heater, then run a hose from the top outlet of the heater to another tee in one of the heater hoses at the top of the engine.
I have one of these heaters on my tractor and another on my skidsteer and they
work great.
My question is I am not sure where to tee in near the top of the engine on my Mercedes.

Thanks for any help.