You’ll have to peer inside of the 2006 Infiniti FX35 and FX45 to see the models’ most notable change. The center dash has been redesigned to mimic that of the Q45 and M sedans, and now features what Infiniti calls the Human Machine Interface. Think of it as a simpler version of BMW’s iDrive system. The setup includes a central knob that can be used as a single control for the audio and climate systems.