I feel so stupid
I just got the car

The coolant res is up to level well close about 1 inch from top.

It was the windshield washer res
I guess the cleaner broke down or the water did it

Anyway I syphoned that watery liquid with blue particles almost all of it

I have to fill that now but not sure if a benz takes standard no frills windshield cleaner.

This means that the engine heating condition is the same as yessterday but its better at idle in garage.

I';ll have to drive it & see
But something is not right with it

Thanks

PS its a 83 500 SEC