Engadget: Ever wish your car’s infotainment system played nice with your iPhone 4S right out of the gate? Well,Mercedes-Benz is doing just that will an update to the COMAND system in A-Class autos. With the aid of two apps — Digital DriveStyle and Drive Kit Plus for iPhone — you’ll be able to access your Apple smartphone’s contents via a built-in display and navigate that iTunes library with an armrest-mounted Controller. Siri will be riding shotgun as the personal assistant can be accessed through the onboard system to send messages, select music, check the weather and schedule meetings. The aforementioned smartphone integration will be available through the entry-level “Audio 20″ configuration. Digital DriveStyle is available for as a free and also touts Garmin navigation, AUPEO! radio, Facebook, Twitter and a Car Finder. While the new tech is only rolling out in A-Class right now, MB says that the B-, C- and E-Class autos will get cozy with your iPhone this fall. More details await in the PR below.