V8 Supercars remain confident more manufacturers will join the championship from next year despite talks between an aspiring team and Mercedes-Benz breaking down.
Australian GT Championship outfit Erebus Racing were hoping to enter the V8s in 2013 after getting a nod of approval from Germany for their plans to run a Mercedes-backed car.
However, their hopes were dashed on Wednesday when the Australia/Pacific arm of the luxury auto maker called off negotiations.
It remains unclear if the news will end Erebus Racing's intention to join the V8s field but V8 Supercars chairman Tony Cochrane is still confident other brands could line up alongside Holden, Ford and newcomers Nissan in the 2013 championship.
Cochrane was angered by some reports Mercedes had been in discussions with V8s themselves and had shunned the championship rather than an aspiring team.