Mercedes team chairman Niki Lauda now tells Handelsblatt: "As far as I know, there is currently an offer on the table that allows the teams to participate in formula one.
"Every team must check for themselves if it makes sense for them or not," he added.
Lauda is more convinced that Liberty is right to want to make changes to the F1 spectacle.
"Liberty wants to make an event out of formula one (races)," he said. "It is unquestionable that spectators only watching cars in circles for two hours is unattractive."