The Mariner is available in Base or Premier trims with either front or four-wheel drive. Both feature a 171-hp 2.5-liter four-cylinder engine and a six-speed automatic transmission. A 240-hp 3.0-liter V6 is an available upgrade. 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, four-wheel ABS and tire pressure monitoring round-out the impressive list. The Mariner carries-on for 2010 with minimal changes.