Sauber: It was a difficult day but we are improving 9 February, 2012 Sergio Perez Feb.9 (Sauber) Sergio Pérez completed his second day of pre-season testing with the new Sauber C31-Ferrari in Jerez today. The day had a promising start with Sergio getting in good lap times immediately on a then cold track and with medium compound tyres fitted. However, shortly before lunchtime it became clear that the gearbox oil filter needed changing which is a very time consuming procedure. Today’s mileage was limited but nevertheless, the Sauber F1 Team has good reason to stay positive. Giampaolo Dall’Ara (Head of Track Engineering):“We started the day with some set-up work in the morning, when we tested different ride heights and dampers. The car responded very well to the changes. It all looked promising. The fact that we later lost significant track time is a shame but on the other hand our achievements so far are very positive.” Sergio Pérez:“It was a difficult day for us but the important thing is that we are improving. Every step we took went in the right direction. Kamui has another day of testing here tomorrow. Obviously he will have an intense programme and I hope we can finish the Jerez test with a productive day.” What comes nextKamui Kobayashi will take over driving duties tomorrow for the final day of pre-season testing in Jerez. Content on GrandPrix247.com by: staff & contributors, Reuters syndication, GMM service, Getty Images, Formula 1 teams, sponsors & organisations.