Mercedes F1 W06 Hybrid - new sidepod air inlet

The most interesting new solution in Mercedes’ aero package in Spain was this small duct (blue arrow) in the new, narrower side pods on the F1 W06 Hybrid.

One may assume they are there for cooling purposes, but they may well also have an aero influence with the diffuser. Also note the two small winglets (top right of picture) just behind the exhaust, beside the deformable rear crash structure.