Helmut Marko conceded that Red Bull's current under performance is to be partly blamed on the teams RB11's chassis.

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In the aftermath of the season opener Australian Grand Prix, Red Bull pointed an accusing finger towards engine partner Renault, emphasizing the manufacturer's power unit weaknesses in terms of performance and reliability.

Renault's Cyril Abiteboul was quick to respond, alleging that the team's car had problems of its own, a state of affairs which embroiled the two partners in a nascent public feud.

Marko has now admitted that the Milton Keyes outfit has issues that it also needs to address.

"The Sepang result was unfortunate for Red Bull Racing," Marko told Servus TV.

"But there is a need to wake up in England as there are some things in the chassis that do not work optimally."

Sunday's race was particularly difficult for both Ricciardo and Kyvat who, amongst other things, encountered early on overheating brake issues.

Red Bull's out performance by its Toro Rosso junior squad, which exploits the same Renault power unit as its sister team, underlined the fact that current difficulties cannot be traced to the engine alone.

Helmut Marko said Red Bull's row with Renault was now over and that the two parties have now put their down together to pull the team out of its doldrums.

"We do not have to love each other, but we do need an engine that works," Marko concluded.

"We have decided to postpone the debate and focus on working together to get us out of this situation and be able to once again fight at the top."

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