No solution in sight to Nurburgring nor Hockenheim dilemmas over commercial deal for 2015 event.
Concerns are growing that Germany really will be dropped from the 2015 Formula One World Championship calendar.
The country's Grand Prix is still on the official calendar in July – the only such event with 'TBA' as a venue – but neither the Nurburgring or Hockenheim are actually yet to agree a concrete race deal with F1's commercial czar Bernie Ecclestone.
Mercedes team chairman Niki Lauda admits the chances of that happening are no better than "50-50".
Lauda's colleague Toto Wolff, the head of Mercedes motor sport, said at the Barcelona test on Saturday that while the problem is mainly financial, the German marque could have some involvement in the talks.
"It is not our area to intervene in the talks between promoter and rights holder," said Wolff, "but as far as we are able to, we will try to help.
"It is an important Grand Prix for us."