From The FIA Stewards of the Meeting
To The Team Manager
Mercedes AMG Petronas F1 Team
Having heard from the Technical Delegate, the Team Representatives and the Pirelli Tyre Team engineer, the Stewards have determined that the pressure in the tyres concerned were at the minimum start pressure recommended by Pirelli when they were fitted to the car. In making this determination regarding the pressures, the Stewards noted that the tyre warming blankets had been disconnected from their power source, as is normal procedure, and the tyres were significantly below the maximum permitted tyre blanket temperatures from other cars measured on the grid. Further, the Stewards are satisfied that the team followed the currently specified procedure, supervised by the Tyre Manufacturer, for the safe operation of the tyres.
Therefore the Stewards decide to take no further action.
Nevertheless, the Stewards recommend that the Tyre Manufacturer and the FIA hold further meetings to provide clear guidance to the teams on measurement protocols.