For the 2010 model year, the Mariner added Ford's MyKey and trailer sway controls as standard on all trim levels. The Mariner engine has a Flex-Fuel option on all models—meaning they can use E85 fuel or regular unleaded only on the optional V6 engine. Ford has also done away with the Euro-style turn signal repeaters for this model year. For the 2011 model year, the Mariner featured HD Radio as a standard, but continued with the same features as the 2010 models. This version of the Mariner was its last, as Ford discontinued the Mercury brand due to declining sales. Ford ended production of the Mariner in October 2010. The last one rolled off the assembly line on October 5, 2010.