Mercedes team principal Toto Wolff says the team had a “setback” with its engine development ahead of the 2019 F1 season.
“There is a tremendous development race that is happened as we speak,” said Toto Wolff.
Toto Wolff: “So we are setting ourselves really ambitious targets.”
“We’ve had some good weeks in the wind tunnel,” Toto Wolff said, but admitted the power unit programme hadn’t gone as smoothly.
“We’ve had a little bit of a setback on the engine side where we believed the new concept would deliver a little bit more.”

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