After weeks of rumours about the financial situation of Sauber F1, which at one point seemed to threaten the Swiss-based team's participation in this weekend's Belgian Grand Prix, it seems that there might be light at the end of the tunnel.

Multiple rumours in the F1 paddock had previously suggested that Nico H?lkenberg hadn't been paid his contractual fee for driving for the team for some weeks, but German media reports on Saturday stated that he had finally started to receive some of the back salary he is owed.

"We got some money," his manager Werner Heinz told Auto Motor und Sport. "At Sauber things are looking up."

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The sight of Sauber's new passive DRS system on the car on Friday also suggests that there is now sufficient money being trickled into the team by its group of new Russian investors coming on board to fund renewed development on the current car as well as the 2014 model.

However another German publication painted an altogether gloomier picture of the situation at Sauber. Die Welt newspaper reported that the money coming in from the Russian investors is little more than a trickle so far, until the deal is fully complete and teenager Sergey Sirotkin is assured an F1 superlicense enabling him to take up a guaranteed race seat with the team in 2014.

Another German newspaper, Bild, went even further and reported that the Russian deal had already imploded. "For Sauber, the situation is dramatic," insisted correspondents Nicola Pohl and Lennart Wermke. "The Russian rescue is probably off the table."

Underneath all the conflicting and confusing messages coming out of Hinwil in Zurich, the take-home message appears to be that Sauber isn't off the critical list yet and that the team's chances of continuing in F1 in the future remain worryingly fragile.