Mercedes' rivals on Friday admitted the Brackley based team is heading into the 2012 season with "a lot" of technical chiefs.
Although they all now have different titles, former technical directors Ross Brawn (Ferrari), Bob Bell (Renault), Aldo Costa (Ferrari) and Geoff Willis (HRT) will all be involved with the design of Mercedes' next single seater.
Sport Bild journalist Ralf Bach at Suzuka claimed it is a "new Formula One record".
"Yeah, that is a lot," agreed McLaren's Paddy Lowe.
Renault's deputy technical director Naoki Tokunaga added: "Each team has its own approach and I think we have a different approach."