Sebastian Vettel is pleased with how Red Bull have progressed during pre-season testing but feels some work needs to be done on the RB9.
Vettel completed 84 laps in the RB9 around the Circuit de Catalunya on Wednesday before handing over control to team-mate Mark Webber on Thursday.
There have been issues but Vettel is optimistic they can be resolved before the season gets underway in Australia in March.
"We still need a bit more time and the good news is there are still six test days left. So far everything is running smoothly here; no real issues aside from the hiccups with the software, but this is not only plaguing us - we are all in the same boat," Vettel said.
"In the mornings it is still too cold and as a result you see the tyres giving up quite fast, but that is also something that we all have in common."
The 2012 Formula 1 season proved to be rather unpredictable with seven different winners at the first seven races before Vettel and Fernando Alonso eventually pulled away from the rest of the field.
Vettel can see no reason why 2013 will be any different and is expecting a number of surprises in the first half of the season.
"I don’t think it will be much different from what was important last year - again it will be very close, so it will not be a case of two or three drivers fighting it out," Vettel told the official Formula 1 website.
"In the first half of the season I expect a very similar situation to 2012 where we saw many different winners. Then, in the second half, some favourites will become visible. To be one of them you have to score points at every race and be consistent - that was what got us the title in 2012."