Ford is investigating whether president Nick Scheele may have improperly steered business to WPP Group, the London-based conglomerate that controls most of the car maker's multibillion-dollar advertising accounts, the Detroit News reported. The newspaper, citing people close to the situation, said that Ford's head of human resources, Joe Laymon, opened the internal inquiry in February after Scheele, Ford's No. 2 executive, sent a one-page letter to executives ordering the consolidation of Ford's marketing and advertising business with WPP Group.