I am studying how animals (including the human beings) can perceive distances thanks to their eyes and their ears. I am focusing on the fact that they always go in pairs: two eyes, two ears, etc.

About the sight, I think our eyes use the parallax. But is this enough? Is this the only way we can perceive distances with them?

About the sounds, I think it is merely by interferometry, but I am not convinced, because the distances between our ears and the wavelength are not always comparable to one another.

What do you think about it?
Thanks in advance,

Isaac


Question: Mercedes SLK (R170) convertible top/trunk release
Answer: Where is the hydraulic pump? Can you get at that to top up the fluid? 

Another option might be to try and remove the rear trim panel (i.e. the bits behind the seats), and see if there is a way through the rear bulkhead into the trunk. Many cars have a non-solid bulkhead in order to save weight. You ought to be able to remove the trim without damaging anything.