My tech suggested using the Zerex 100,000 mile antifreeze. This also has the anti corrosion protection.
He also mentioned something else about the MB antrifreeze which I'm not sure of. He stated that MB antifreeze contains small solids (phosphates) which can accumulate and clog your radiator. The Zerex clearly states "No Phosphates".
I've had it in my car for a month now and the car never exceeds 95C even on a hot day.
I wouldn't suggest waiting until 100K to change the fluid no matter what it says on the bottle.
02 C32 AMG
84 190E 2.3 5 Spd