For an extreme Jelly mould Red Bull did this with RB7. For the radiators tucked into the chassis that has been a Mercedes trait in the hybrid regs along with their long wheelbase and it seems Mercedes really cranked up tucking the radiators with the jelly mould sidepod for these new regs.
I am noticing it now, but the car in Barcelona was the same underneath the skin if the side pods! Mercedes simply used a bigger cover over it and did well not to remove them in plain sight.
The outwash is massive when I look on it from a slight side angle, and the immediate downwash after the crash structure is also incredible.