SEOUL, South Korea - Is Mercedes anchorman Ross Brawn going or staying? Depends on who you believe but certainly the rumours were strong in the pits during the Korean F1 GP.Mercedes on Monday denied reports that team boss Ross Brawn has decided to leave the team at the end of the 2013 Formula 1 season.Sport Bild reported that Brawn would be replaced by Paddy Lowe and possibly re-join the 2015 McLaren engine supplier Honda.RUMOUR MILLBrawn was team boss of Honda's F1 team until the Japanese automaker pulled out of F1 at the end of 2008. He led a management buy-out, winning the title with Jenson Button as Brawn GP in 2009, and sold the team to Mercedes at the end of the season. Correspondents Ralf Bach and Bianca Garloff said Brawn told Mercedes chairman Niki Lauda of his decision to leave the team at the 2013 Korean GP.Sport Bild said Lowe's arrival during the 2013 season from McLaren was the deciding factor for Brawn's “decision” and that he did not fully support the change of structure involving Lauda and Toto Wolff.However Mercedes team chairman Niki Lauda rubbished the claims (sort of): "I don't know where this story is coming from, nothing has changed."Lauda did, however, admit that negotiations were taking place but a decision would "definitely not" be made within the 2013 season.He said Mercedes wants to keep Brawn on board, "but of course it's his decision". Or not... Stay with Wheels24 for the 2013 F1 season – fresh reports every day.