Nacha Cattan & Andrea Navarro:

 Daimler AG and other truck makers are fighting to delay new emission standards in Mexico as the government struggles to control the worst smog in the capital city in 14 years.
 The Latin American nation published draft rules in December 2014 to slash emissions on all new trucks and buses. Since then the regulations have stalled as companies including Daimler, which is Mexico’s largest builder of heavy duty vehicles, call for less stringent controls, saying the tighter standards could make new trucks too expensive for consumers.