Mercedes Grand Prix team principal Ross Brawn has said the ban on team orders is no longer workable - and that changes are now needed to 'maintain the integrity of competition and safeguard the sport'.

His comments follow Sunday's controversial German Grand Prix, which saw Ferrari fined $100,000, when the stewards deemed the Scuderia had broken the rules on team orders and brought the sport into disrepute. The matter was also referred to the World Motor Sport Council.

Although the Maranello-based outfit denied any wrongdoing, with Felipe Massa later insisting it was his decision to let Fernando Alonso pass, the incident was heavily criticised, with Niki Lauda, for example, slamming it as the 'most stupid thing he has ever seen' [see separate story - click here].

Brawn now believes it is critical for the rules to be amended: "I understand how F1 fans might be disappointed by what they saw on Sunday," he told Gazzetta dello Sport.

"The rule that bans team orders is not realistic anymore and so the teams and the FIA must together find a transparent solution that maintains the integrity of the competition and safeguards the sport."

Brawn meanwhile, who of course was at Ferrari back in 2002, when Rubens Barrichello was ordered to let Michael Schumacher win the Austrian Grand Prix, something that triggered the ban on team orders, added though that Mercedes would use such tactics if it was in a similar situation to the Scuderia.

"Our drivers are asked to avoid clashing against each other," Brawn continued.

"And if one has the chance to take the title while the other one doesn't, we want both of them to act in the interest of the team without throwing away that opportunity."