The 2006 Mercedes-Benz M-Class, also known as the W164 generation, is a luxury midsize SUV that marked a radical departure from its predecessor with a unibody construction and fine attention to safety. Standard engine was a 3.5-liter V6 producing 268 horsepower, coupled with a 7-speed automatic transmission. The drivetrain was primarily RWD with the 4MATIC AWD system available in all models. The higher-performance ML500 featured a 5.0-liter V8 delivering 302 horsepower. The M-Class showcased an array of safety features including stability control, antilock brakes, and front-seat side airbags, along with optional rear side airbags. Inside, the M-Class was made more spacious and luxurious, with available features including a power liftgate, navigation system, and an upgraded Harman Kardon sound system.