Mercedes eventually chose to end its on-off relationship with its rear suspension package, first pressed into action on its Formula 1 car at Imola, at the Hungarian Grand Prix. While not outwardly blamed for the team's general downturn in form, the revised suspension was seen as an obtrusive element in developing and understanding its W16 further.
What's known is that the package was aimed at reducing the rear axle lift under load. The theory in doing so is that the downward force on the rear tyres remains much more steady, and keeps the underbody at a static level to generate a consistent level of downforce.
