Mainstreet Edition, 2.4L Engine, A/C with Auto Temp Control, Sirius Satellite Radio, CD/MP3 Radio, Steering Wheel Mounted Audio Controls, Temp Compass Gauge, Power Seat, Antitheft System, Keyless Entry! Gas mileage estimates for the four-cylinder Avenger with the six-speed automatic are 20/31 mpg. The 2011 Avenger receives noteworthy changes inside and under the hood. Dodge made a number of changes for 2011 aimed at quieting the car like installing an acoustic glass windshield, laminated side windows and new sound-absorbing material. If quiet is what you want in a family sedan, check out this car. The Avenger's suspension was also overhauled for 2011, and the results are good. Unlike some cars, in which you can feel shimmy when you hit particularly nasty bumps, the Avenger's suspension is especially tight, with no unnecessary wiggles to sully the driving experience. The 2011 Avenger was awarded Top Safety Pick status by the Insurance Institute for Highway Safety thanks to its performance in front, side and rear crash tests, plus a roof-strength test (the Avenger received Good scores — the best possible — in all four tests). It also has a standard electronic stability system. Other standard features include antilock brakes, side-impact airbags for the front seats, side curtain airbags and active head restraints for the front seats., ,