Formula One F1 - Mexican Grand Prix 2017 - Mexico City, Mexico - October 28, 2017. Mercedes' Lewis Hamilton in action during practice. REUTERS/Henry Romero
SAO PAULO (Reuters) - Champions Mercedes plan to use the last two races of the Formula One season to test new ideas and parts for 2018 now that they have won both titles.
The British-based team said in a preview for Sunday's Brazilian Grand Prix that, with nothing at stake, they could afford to become "a little bolder" and experiment in Friday practice.
