Lewis Hamilton is frustrated after his car is engulfed in flames during Malaysian GP in Sepang. Inset: Lewis Hamilton. Pics/AFP

Kuala Lumpur: Mercedes dismissed suggestions of sabotage to Lewis Hamilton's car as "ridiculous and stupid" after another engine failure robbed the world champion of certain victory in Sunday's Malaysian GP. Hamilton, who now trails rival Nico Rosberg by 23 points to the title, stoked flames of a conspiracy theory claiming "someone doesn't want me to win", and demanded answers from Mercedes.