Looking at close pictures of the Mercedes W07 I noticed what seems an exhaust hiding in the shadow of the side plate, where the livery goes from gray to green. It may not be significant, but does anybody know the purpose of that?
It’s weird it has a hole, though. Some other teams have that feature in their sidepods as well, but all of them seem to be closed at the tip. Maybe Mercedes has somehow found a way of efficiently using that structure to blow some air along the sidepod for better efficiency.