The E320 Bluetec is equipped identically to the E350 Luxury version, but features the turbodiesel engine. E320s are available in Sport or Luxury trim. The E320 4Matic wagon is equipped comparably to the sedan. A power liftgate and cargo organizer are standard, along with a folding third seat that increases passenger capacity to seven. Safety features that come standard on all models include eight airbags: dual front airbags, side-impact airbags for front and rear passengers, and head-protection curtains that run the length of the cabin on both sides.For 2007, the Mercedes-Benz E-Class gets more powerful engines, subtle styling changes, new interior elements, and a few tweaks for handling and safety.