Mercedes are still guided by the ‘trauma’ of last year’s United States Grand Prix, team principal Toto Wolff has said. The Silver Arrows made a disappointing start to the 2024 season by picking up just 16 points in Bahrain. But Wolff says they have adopted a more conservative approach since Lewis Hamilton was disqualified from the race in Austin last October. Hamilton finished second behind Red Bull driver Max Verstappen in Texas but ended up losing his points because the Mercedes was running too low. There were flashes of promise from the Silver Arrows in Sakhir as Hamilton topped second prac…