My 500SEL is running too hot for my flavor.

I have done everything I could to make the engine run cooler but no good results yet.
I flushed the system several time, installed a new visco fan clutch (Behr/China crap), new radiator, new water pump and new thermostat.

Still the engine is running at 90-100C degrees at all times.
The thermostat is the OE 84 C but still temperatures still running 10 degrees higher. Ignition timing is to specs.

The electric fan come on very often and I am at a loss.


My other Mercedes stay cooler and are much more stable around the thermostat temperature and a few degrees higher.

I have not changed the temperature sensors.

Any ideas what the problem might be?

Martin