He says: 'The two major technologies - the F-duct and the blowndiffuser - we are still not completely there with.
BBC: Hungarian GP as it happened
2.
Mercedes had arrived at their home race in Hockenheim with a modification to their exhaust blowndiffuser and a new rear wing.
BBC: F1 test ban ridiculous - Michael Schumacher
3.
His driving style was not suited to the off-throttle blowndiffuser, which Vettel used to such devastating effect en route to 11 wins in a truly dominant season.
CNN: Mark Webber: F1's elder statesman remains outsider