Not an EQA owner but have its bigger brother EQC which makes all sorts of noises whether switched on or not. But I have heard nothing quite like that I would take it to your dealer and get them to have a look. There is some sort of brown liquid or stain on the cross member in the righthand of the picture is it just dirty water from the road or is the car trying to pump something which is leaking or has leaked hence the noise? Most of the noises I hear are clicks and whirrs and the occasional noise of water trickling through the system somehow. Good luck and let us know the outcome.