Cooling fan..

[Locky]

Hi all.... I have a simple question. I recently changed the thermostat on my E220 cdi as it was running at a cool 60c .... the now runs up to temp but when I started the car from cold with the bonnet up the electric fan was running. It wasn't running fast. Is this normal? I've only had the car a few days and MB is new to me so I am unsure if this is normal.

 

[Locky]

Had another look at this just now and it seem that there is 4 volts coming out of the fan socket. Is this van variable or should it simply be on or off??

 

[Locky]

Well I can't believe nobody knows if the fan runs at slow speed all the time... Oh well.... Spoke with a MB specialist today and it shouldn't .. The relay near the front wing is stuck closed...