Sebastian Vettel had to conclude the shakedown with the newly launched RB5 prematurely today.

The German began running in the car this morning after it was unveiled to the media in the pit-lane at Jerez de la Frontera. He took the Renault-powered machine out for a series of installation laps, and then completed more laps until concerns with the gearbox brought the shakedown to an early close.

Despite only completing 14 laps though, the outfit maintained it had gained 'useful information' and RBR team boss, Christian Horner still described the day as a 'success'.

"Following a successful shakedown, we stopped the car as a precautionary measure because the gearbox oil temperature was beginning to rise," he explained. "We ran with our KERS system fitted to the car, but it was not operational.

"We simply carried it to assess its impact on other elements of the package, such as weight distribution, and to study the effects on the system of vibrations and other forces."

Vettel meanwhile also maintained he was happy: "The guys did a fantastic job to get the car here and ready for this first run," he added.

"I was happy to be driving again, but don't ask me to comment on the feel of the car as it's far too early for that.

"With the shakedown out of the way, we can get down to developing the car starting tomorrow and over the next few days. Stopping early today was definitely the right decision, as you really need to understand exactly what causes any problem on a brand new car."