I had Google maps working fine on my original MMI unit, which had a maps and firmware update from the dealer when I bought the car. It had a built in SIM slot, but I used RSAP to connect via the SIM in my phone.
It only connected as 2G (GPRS) speeds, but for maps it worked just fine.
VCDS Scan of that unit is here:
Code:
Address 5F: Information Electr. (J794) Labels: 4E0-035-6xx-5F.clb
Part No SW: 4H0 035 670 P HW: 4H0 035 670
Component: H-BNT-EU H48 0798
Revision: -------- Serial number: xxxxx
Coding: 020101000001F9EF75168B1E00000003000001000000000000
Subsystem 1 - Part No: 8R0 060 884 CH
Component: EUR 2014 2004
Subsystem 2 - Part No SW: 4F0 910 393 AH HW: 4F0 862 393 E
Component: BTHS H24 0750
Subsystem 3 - Part No SW: 4H0 919 604 B HW: 4H0 919 604 B
Component: DU8 D4 SV NB H44 0021
Subsystem 4 - Part No SW: 4H2 919 600 H HW: 4H2 919 600 B
Component: E380 BDT D4 H09 0065
Subsystem 5 - Part No: 8R0 060 961
Component: CD-Database 1886
Audi changed the 5F unit to a newer one (at great expense it seems), which now connects a 3G speeds, maps works just the same (maybe loads faster, not really so as you would notice) but they forgot to do a maps update - which they will do when they next see the car
Scan of the "new" 5F module here:
Code:
Address 5F: Information Electr. (J794) Labels: None
Part No SW: 4H0 035 654 HW: 4H0 035 670 C
Component: H-BNT-EU H43 0939
Revision: -------- Serial number: XXXX
Coding: 020101000001F9EF7516AB1E00000003000001000000000000
Subsystem 1 - Part No: 8R0 060 884 AH
Component: EUR 2012 1308
Subsystem 2 - Part No SW: 4F0 910 393 AH HW: 4F0 862 393 E
Component: BTHS H24 0750
Subsystem 3 - Part No SW: 4H0 919 604 B HW: 4H0 919 604 B
Component: DU8 D4 SV NB H44 0021
Subsystem 4 - Part No SW: 4H2 919 600 H HW: 4H2 919 600 B
Component: E380 BDT D4 H09 0065
Subsystem 5 - Part No: 8R0 060 961 C
Component: CD-Database 3638
No fault code found.
If you don't have a SIM slot, I believe that you can re-code and use WiFi to connect via your mobile or alternatively you can plug a USB dongle in via the AMI. Have a read on the A5OC, lot's of detail on there
If you do have a SIM slot, it is as simple as firmware update and a bit of coding