Merc300SE

Yesterday, I added coolant and drove about 25 miles. On the way home we stopped at the post office and coolant leaked out of the coolant reservior because the top was not secured by me earlier that day. When I got home I added more coolant and sealed the radiator cap on the reservior thinking I had fixed the problem. Today the car still runs in the 90 to 105 degree range. The auxillary fans run and if I find a stretch of open road it gets down to 85. Should I look to change out the coolant on the vehicle?

Sathinas

Sure, change the coolant. Then, change it again, when that won't work.

Did you bleed the air trapped in the cooling system? I'm guessing not?