Mercedes, McLaren, Racing Point, Red Bull, Renault, AlphaTauri and Williams called for “full and proper disclosure in the matter”. They said that they reserved the right to take legal action if their demands were not met.
“We, the undersigned teams, were surprised and shocked by the FIA’s statement of Friday 28 February regarding the conclusion of its investigation into the Scuderia Ferrari Formula 1 Power Unit,” the statement read.
“An international sporting regulator has the responsibility to act with the highest standards of governance, integrity and transparency.
“After months of investigations that were undertaken by the FIA only following queries raised by other teams, we strongly object to the FIA reaching a confidential settlement agreement with Ferrari to conclude this matter.
“Therefore, we hereby state publicly our shared commitment to pursue full and proper disclosure in this matter, to ensure that our sport treats all competitors fairly and equally. We do so on behalf of the fans, the participants and the stakeholders of Formula 1.
“In addition, we reserve our rights to seek legal redress, within the FIA’s due process and before the competent courts.”
The only teams not to have signed the letter are Haas, Alfa Romeo and Ferrari itself, all of which use the Ferrari engine