Mondeo 1.8glx 16v R reg - odour in interior - poet56

I have a strange odour in my Mondeo, the nearest thing to describe it is either fish or cat pee? Anyone else had this problem and what is the cause and cure? Any help appreciated ando n there is nothing on the carpets etc no dampness etc.

poet56

Mondeo 1.8glx 16v R reg - odour in interior - Galaxy

It could be the aircon leaking. Does the aircon work OK?

It could be the heater radiator leaking. Does the coolant level appear to go down? If the leak is small then you wouldn't necessarily get wet carpets, but you would get a smell.