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'96 E320 sedan
77 Posts
Mine runs at about 85 deg C in normal running. A little higher in warmer ambient temps and a little lower if it is cool and raining.

I suspect your thermostat is not opening all the way and limiting flow through the radiator. That or fans are not running as/when they should or you might just be due for a coolant flush.

As witness the above, you probably have some research to do. I'd start with a coolant flush and go from there.
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