Mark Webber kept Porsche on top in second Practice for the FIA World Endurance Championship round at the Nurburgring, but the sister car which topped first practice, could only manage fifth.
Marcel Fassler set the second fastest time in his Audi, shared with just Andre Lotterer this weekend as Benoit Treluyer recovers from injury.
Fassler was just over a tenth of a second faster than the other Audi, with Stephane Sarrazin in fourth.
Romain Dumas suffered brake failure sidelined the second Porsche after just 40 minutes, but he was still able to set the fifth fastest time ahead of the other Toyota.
G-Drive again took LMP2 honours, posting a lap time more than a second faster than Strakka Racing's entry.
Bahrain International Circuit - Winter testing