2009 mercury mariner review this car review is specific to this model, not the actual vehicle for sale. Out with the old and in with the new must have been mercury's philosophy for 2009. Similarly, the 3. 0-liter v6 has also gained horses - up from 200 to 240-hp. The revised 3. 0-liter v6 uses the new six-speed automatic exclusively. Standard safety features include front airbags, front seat mounted side airbags and side-curtain airbags for front and rear passengers. Advancetrac stability control with anti-rollover technology is now standard across the board.