 A high-resolution 7" touchscreen DVD-based Gen V navigation system with voice recognition, Bluetooth, a backup camera, and a 14-speaker Mark Levinson premium sound system are available as options.In response to criticism regarding the lack of a stability/traction control disable switch on 2006 IS models, Lexus added a VDIM/VSC off switch for the 2007 model year.For 2006 IS models, the stability control system/traction control system can be disabled through non-conventional methods by using a code during engine start.