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MONTMELO, SPAIN - FEBRUARY 24: Paddy Lowe, Mercedes Technical Executive Director speaks with Managing Director of Mercedes GP Performance Powertrains, Andy Cowell in the pit lane during day three of F1 winter testing at Circuit de Catalunya on February 24, 2016 in Montmelo, Spain. (Photo by Dan Istitene/Getty Images)

MONTMELO, SPAIN - FEBRUARY 24:  Paddy Lowe, Mercedes Technical Executive Director speaks with Managing Director of Mercedes GP Performance Powertrains, Andy Cowell in the pit lane during day three of F1 winter testing at Circuit de Catalunya on February 24, 2016 in Montmelo, Spain.  (Photo by Dan Istitene/Getty Images)