P1racenews AI automatic summary:
Mercedes has debuted a sizeable upgrade package on the first day of the final 2026 Formula 1 pre-season test in Bahrain
Mercedes introduced a significant upgrade package on the first day of the final 2026 Formula 1 pre-season test in Bahrain. Kimi Antonelli and George Russell are sharing driving duties during the first day of the second Bahrain test after ending the previous week’s test on top. The team has made several changes to the W17, such as a more compact rear end on the sidepod and a new vane on top. Additionally, there are adjustments to the wing mirror mount, floor corners, brake ducts, and front wing endplate. A slightly revised engine cover with exhaust housing and updated cooling gills on the sidepods can be seen at the rear of the car.
