"Things picked up a bit of momentum again last week. We're talking to each other, so to speak. But there's nothing to announce yet," the 41-year-old said.
Mertesacker had recently gone on record saying he would be open to taking on a role at the DFB, and the 2014 World Cup winner is considered a strong candidate to succeed Andreas Rettig, who is stepping down from the top of the federation at the end of the year.
Mertesacker made the comments while working as a pundit ahead of the World Cup final between Argentina and Spain, having spent recent years leading Arsenal's youth academy in London. Should talks progress, he would take up a senior role at a federation currently working to finalise the appointment of Jurgen Klopp as the new national team head coach, following Julian Nagelsmann's exit after Germany's disappointing showing at the tournament.
For now, Mertesacker has been careful to stress that no agreement has been reached, even as speculation over his potential move to Frankfurt continues to build.
The former Arsenal and Werder Bremen defender has long been considered among the frontrunners to take over from Rettig, whose position has been the subject of internal upheaval at the federation in recent months.
Mertesacker's background running one of English football's most respected academy setups has been seen as a strong point in his favour, particularly given the DFB's stated priority of overhauling its own youth development structures alongside the search for a new head coach.
Mertesacker made clear that any final decision on his future is likely to follow rather than precede the confirmation of Klopp's appointment, with the federation keen to settle the more pressing matter of the national team's leadership first.
Once that process is complete, attention is expected to turn more fully to finalising the boardroom appointment, with Mertesacker's name remaining the one most consistently linked to the position.