At the 2018 Azerbaijan Grand Prix, Mercedes trialled a spoon-shaped central section with distinctive vortex-generating serrations on the trailing edge of the main profile. The spoon-shaped central section reduces the section of wing towards the outboard ends which will reduce the amount of drag and down-force, however gaining straight line speed when opening the drag reduction system. The jagged serrations which are bonded to the wing underside, will energize the airflow, trying to claw back some of the down-force lost to the narrower outboard ends.