Engine Temp close to 120F HELP!!!

[benzpapi23]

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Its been close to a week now and my engine has started reporting Temps of or close to 120F. Its a '95 E320, the Aux Fans come on and stay on, but the Temp sits teasingly close to 120. WHen I hit the Freeway, it cools down to 80, but gets right back up when I hit the Streets. I've got an appt with the "Stealer" tomorrow, but wanted some input from you guys first.

What could it be? Bad Coolant Sensor? Bad Radiator? I haven't done a flush of the Coolant fluid in some time so I don't know if it might be deposits in the radiator. But would that explain why the Aux Fans stay on. HELP!!!

Rene

 

[Spike]

Have you checked that the thermostat is opening and the coolant is up to the right level?

Personally for $8 for a thermostat, I'd swap it out for a new one and flush the system and put some new coolant in it.