Ferrari's Sebastian Vettel pushed Formula One leader Lewis Hamilton off the top of the Austrian Grand Prix practice time sheets on Saturday while Red Bull Racing's Max Verstappen hit problems.
The German lapped the scenic Red Bull Ring Spielberg in a track record time of one minute 04.070 seconds, a mere 0.029 quicker than fellow-four time world champion Hamilton in the Mercedes-GP, with sunshine replacing overcast skies.
Verstappen, meanwhile, parked up by the side of the track some 10 minutes from the end of the third and final session before qualifying.
"The engine just shut down," the 20-year-old Dutchman, who had an army of orange-shirted fans packing the grandstands and is eager to make up for crashing out on the first lap last year, said over the team radio.
"Hopefully it's as simple as a box being changed," Red Bull principal Christian Horner told Sky Sports television.
Hamilton was quickest in both of Friday's practice sessions, at a track that has crowned a Mercedes winner in each of the four years since Austria returned to the calendar in 2014, but Ferrari appeared to have found some extra speed overnight.
Finland's Valtteri Bottas, last year's winner from pole position after teammate Hamilton took a grid penalty, was third on the time sheets with a time 0.134 seconds slower than the Ferrari.
The top three teams again filled the top six places, with Ferrari's Kimi Raikkonen fourth fastest ahead of Verstappen and Red Bull's Australian Daniel Ricciardo in sixth place.
France's Romain Grosjean, still without a point this season, was seventh with Haas teammate Kevin Magnussen eighth and Renault's Carlos Sainz ninth.
Sauber's Monegasque rookie Charles Leclerc continued his fine form in 10th, with Swedish teammate Marcus Ericsson providing a benchmark in 16th.
Leclerc ended the session as a spectator, however, after also having problems.
"I think there is something wrong with the engine," he reported.
