Toto Wolff has revealed the reasoning behind Mercedes' decision not to supply Red Bull with engines, saying they wanted to make sure that the works team remain their "primary focus".
It has been an open secret for several months now that Red Bull are shopping around for a new power unit supplier after their relationship with Renault turned sour following the introduction of the new V6 engines at the start of 2014.
Mercedes were first mooted as a possible supplier, but the German company's board confirmed ahead of the Italian Grand Prix that it is a no-go and Wolff says they didn't want to change their current model.
"We decided with our board that we as an engine supplier – and as a team – have worked hard and long to achieve the success we have today, after taking the decision to enter the sport again as a works team in 2010," he told Formula1.com.
"Therefore we decided two weeks ago against exploring an engine supply to Red Bull. We wish to continue with our model to support independent, privateer racing teams – and to respect the relationships we already have in place with our customers – alongside our primary focus on the Mercedes works team."
When asked if he was the driving force behind the decision to say, Wolff replied: "I have never hidden my opinion. But we take decisions collectively and objectively, evaluating all the pros and cons, and not as individuals."