While Audi and Ferrari introduced their first ADUO upgrades of the season in Barcelona and Spielberg respectively, Mercedes also arrived in Austria with a new power unit specification.<br>In Mercedes' case, however, it was not an ADUO step but a reliability upgrade following the numerous retirements earlier this season, with Kimi Antonelli's DNF in Barcelona being the most recent example for the ...<a class='more' href='https://www.motorsport.com/f1/news/why-mclaren-wont-have-mercedes-new-power-unit-for-f1-british-grand-prix/10835874/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-F1&utm_term=News&utm_content=www'>Keep reading</a>