Sebastian Vettel was happy following Friday practice for the European Grand Prix, but despite setting the pace, he added that it was too soon to judge the merits of the latest updates to the RB8.

Vettel, who was second quickest in first practice, improved to post a 1 minute 39.334 second lap this afternoon, something that left him 0.131 seconds up on Nico Hulkenberg's Force India.

"We have tried some new parts on the car today, but the lap times have not really allowed us to have a fair conclusion of them yet," confirmed the Red Bull man. "It was important to have a clean practice today though and I'm happy with what we did.

"The conditions will change again for Sunday I think; it was a bit cooler today, which will make a difference.

"It's close between the teams and it's not yet clear what the right strategy is for Sunday, hopefully we can make a step forward tomorrow."

Mark Webber meanwhile was third quickest in the opening session this morning, before ending the day down in ninth, 0.567 seconds off his team-mate.

"The car's working well, but there are areas where we can improve. I was happier on the harder tyre, the balance on the soft tyres wasn't great today, but we'll work on that tonight," he added.

"The wind was playing a role today - but there will be less tomorrow. Regarding changes we've made to the car, we'll know on Sunday if they're working well for us.

"The circuit will get a bit quicker as we lay rubber down, and it will get a bit hotter as well, so let's see."