So i have unpleasant sounds from the dash (underhood?) on certain revs, actually when car/engine trembles. Its something not screwed or what. I recorded two videos, check maybe someone had somethink like this

Edited 3 December, 201411 yr by DanciN

Just guessing but it sounds like the noise I have had when a leaf had got through into the fan assembly. Only difference is that yours is dependent on the speed of the car.

So, do you normally drive with the heater fan switched off? And does the noise come back when you switch the fan to a higher speed?

something rattles inside the dash,no relation to cliamtronic unit

Is a diesel and when dropping to lower revs sounds increases...