[6][7] However both drivers had a couple of small incidents, with Coulthard "kissing the wall" between turns 7 and 8 at the Circuit de Catalunya on 19 February 2008,[8] and Webber having some minor kerb damage on the monocoque, which could "not be repaired in time to resume testing" on his first day driving the RB4.

[9] Even considering the setbacks and competitive times, the team and both drivers were making sure but steady progress throughout the 2008 testing season, optimising the RB4 to the new rules and regulations.

[12] When the Red Bull Cola was launched, the brand was advertised on the bargeboards and rear wing in certain races.

In Brazil, Coulthard's RB4 was decorated in the livery of "Wings for Life", a charity dedicated to raising awareness of spinal cord injuries.

Red Bull received approval from the Fédération Internationale de l'Automobile, Formula One's governing body, to run Coulthard's car in different colours than his teammate Webber.