Audi A4 B9 MMI Navigation plus MMI touch (4G) In order to update your GPS device: Audi A4 B9 MMI Navigation plus MMI touch (4G) with the latest update, follow next instructions. First of all, be sure you got the update file for your Audi A4 B9 MMI Navigation plus MMI touch (4G) device, downloaded from SpeedcamUpdates.com. Aftermarket GPS Navigation Head Unit is specially designed to replace Audi A4/S4/RS4/A5 (B8) factory LCD screem unit (No navigation system) and add a DVD player (optional, mounted in storage box on passenger side). It has the same plug and harness as original radio, totally plug and play. On members of the B8 family of vehicles (the A4 (Typ 8K), A5 (Typ 8T), and Q5 (Typ 8R)) without full navigation capability, Audi does not describe this infotainment system as MMI, although an MMI-esque control dial and function keys is provided on the radio/CD head unit. Competing technologies.