I've just noticed that the electric radiator fan is running all the time the engine is running on my 2002 ML270. It's not running full speed (ie you can't hear it).

Diconnecting the signal wires connector stops it and lights the dash Engine Coolant warning.

I would add that the engine isn't fully warm yet (it's always been slow to warm up) - but I can't recall if the fan has always done this.

Can anyone with a 2002 ML270 say if theirs i sthe same please ?

Regards
Dave