Despite pulling off a career best second at Monaco last Sunday, the little German is more likely than Williams' Mark Webber to make way for possible arrival Jenson Button.
Heidfeld said at his 'home' Nurburgring venue: "As long as I get good results, I don't even think about the future."
The German does, though, expect a tougher time on the more conventional Nurburgring layout.
"Probably those teams who struggled on their tyres (at Monaco)," he warned, "will not do so again. I don't know."
However, technical director Sam Michael said the track - although much quicker - is still, like Monaco, maximum downforce.
And Nick? "He really attacks," the Australian lauded. "He's very good. When he smells it, he's in there."