Unusual Fan type noise

[Dave JRH]

Hi All,

Got in my W211 E320 this morning turned the key to position 1 and a fan type noise started behind the L/H side of the dashboard. Never heard it before and it stops when i turn the key off.

Still running when i arrived at work 30 minutes later

Any ideas ?

Dave

 

[Dave JRH]

Well, started the car this evening and the fan noise was no longer running ..............or could it have been a pump ie condensate pump from the A/C ?

 

[streethawk]

Well, started the car this evening and the fan noise was no longer running ..............or could it have been a pump ie condensate pump from the A/C ?

If your a/c is on it will work automatically if ambient temp is above what it's set at. Try pressing E/C button which is economy mode which turns it off. As long as yours has that. My c230 does.

 

[Dave JRH]

The A/C was off, in fact everything was off, but this fan/pump whining noise started when the key was in either position 1 or 2.......never heard it before and i have owned the car for more than 2 years and just as mysteriously it has now stopped.....