Auto Motor und Sport reports that on Tuesday, team technical bosses met and the Mercedes and Red Bull-like suspension systems were "at the top of the agenda".
"The other teams want to stall the technology," said correspondent Michael Schmidt.
However, the FIA initially reacted to Ferrari's complaint by confirming the legality of the top teams' designs.
And following Tuesday's meeting, the Spanish sports daily Marca says Mercedes and Red Bull continue to have the green light to run the controversial systems.
Schmidt said: "Now the engineers want the FIA to explain how the chassis are legal. It could lead to the threat of a protest in Melbourne against Mercedes and Red Bull."