Kofi:

There is nothing wrong with your cooling system. Normal operating temps will be around 80-100c. It is common to get a temp spike when the car is off. The heat has to go somewhere when the cooling system is not pumping.

As long as you are somewhere in the 80-95 range while cruising down the road at speed, everything is fine. It wouldn't hurt to flush the cooling system, but likely won't help you at all with lowering your temps.

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2