Sorry to do this to everyone for the zillionth time but here goes.  Driving along and the car starts to sound like theres a belt dragging under the bonnet, the sound rises and falls with the engine revs.  Found out if I turn the air-con from 'auto' to 'econ' the noise disappears.  Any ideas?  Should I get the air-con looked at ?  is it just one of those Skoda noises that make ownership so interesting 

Edited 30 November, 201510 yr by SkodaKitteh

I would get the air con looked at tbh. Or at least the belt that drives it.