300e 2.8 M104 engine.
The temperature stay at 100-105 C when ambient temp is over 85 F.
Even if I am driving on the Hwy at 70Mph it does not go lower than 100 C.It is a permanent cicle of the auxiliary fan.
But if I am in trafic and the engine is ideling the car cools down to 87 C in about 5 Min.
I have done the folowing:
New fan clucth ,new radiator, new termostat, flush the coolant with genuine MB fluid.
Also I have changed one of the auxiliary fan that was bad. The aux fans work fine. They start when the A/C is on, in first stage and at 105 they go in second stage .
I don't Know wat coud be. Most of the people on this forum claim that a soon as the car is driven at hwy speeds the engine should cool down.Mine is the other way.....!!!!!!

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New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru