Mercedes' Wolff fears no-deal Brexit's effect on Formula One

Mercedes driver Lewis Hamilton of Britain steers his car during a Formula One pre-season testing session at the Barcelona Catalunya racetrack in Montmelo, outside Barcelona, Spain, Monday, Feb.18, 2019. (AP Photo/Manu Fernandez)

Mercedes driver Valtteri Bottas of Finland steers his car during a Formula One pre-season testing session at the Barcelona Catalunya racetrack in Montmelo, outside Barcelona, Spain, Monday, Feb.18, 2019. (AP Photo/Manu Fernandez)