The GLK-Class consists of two models, the two-wheel drive 2010 Mercedes GLK-Class and the all-wheel drive GLK350 4MATIC.Standard safety features include electronic stability control, electronic traction control, brake assist, active front head restraints, as well as front, side, and side curtain airbags.The 2010 Mercedes GLK350 is the second-cheapest Mercedes you can buy in this country, but