Toto Wolff, Mercedes, Circuit de Catalunya, 2018 Link to this image full-size: https://www.racefans.net/2018/03/05/racefans-round-up-05-03/motor-racing-formula-one-testing-test-one-day-4-barcelona-spain-323/Toto Wolff, Mercedes, Circuit de Catalunya, 2018Advert | Become a RaceFans supporter and go ad-freeToto Wolff, Mercedes, Circuit de Catalunya, 2018