Dual-Axis Steering, or DAS, is an innovation that appeared on the Mercedes in 2020.

The team’s engineers added a function to adjust the toe (alignment) of the front wheels by pushing or pulling the steering wheel. This allowed the driver to add friction and evenly heat the front tyres but return them to their optimum position when needed. 

The FIA banned the ingenious system in 2021 due to the costs associated with developing it. 

Mercedes DAS (Dual Axis Steering) system [merged] - Racing Comments - The  Autosport Forums

Andrew Burden

The author Kiwi F1 Fan