- Sebastian Vettel makes first appearance in new Red Bull at Jerez
- German driver aiming to win a fourth world title in succession
- Ferrari's Felipe Massa tops the fastest lap charts ahead of Mercedes' Nico Rosberg
Sebastian Vettel revved up his engine for the first time this winter as he started preparations to claim a fourth successive world title.
The German, who became the youngest triple world champion last season, completed over 100 laps at Jerez as Red Bull continued its testing period in Spain Thursday.
Vettel, 25, clocked the third fastest time of the day behind Ferrari's Felipe Massa and Mercedes' Nico Rosberg after coming home in one minute 19.052 seconds.
"So far, I think we can be pretty happy," Vettel told reporters ahead of the season-opener in Melbourne on March 7.
"(Teammate) Mark (Webber) had a good couple of days to start with and I took over today. It was great to get back in the car, to get rid of the rust and to get back in the groove again.