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A4 Avant B9 USB ports
01-08-2020, 22:21 PM,
Post: #1
ZTAudi  A4 Avant B9 USB ports
Hello guys my 1st thread here.
I'm the proud owner of an A4 Avant B9. I've 1 USB port and 1 AUX port under the armrest. The usb port says "charge only" so I assume that there isn't no data connection. I don't have android auto but I love to have it. I think I'll need to swap the USB port, can you show me the way? I needed some help with the new usb port module connection.
I think it's possible to add the google auto at my MMI. My version is MHS2_ER_AU_P1242.

Thanks in advance.
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02-08-2020, 19:36 PM,
Post: #2
RE: A4 Avant B9 USB ports
You need to change USB port - next make wiring from armrest to unit in glovebox (USB) and connect USB to power and line in from existing USB. I have double USB ports from Audi original from B9 if You looking for.

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  • paulojrc
02-08-2020, 20:09 PM,
Post: #3
RE: A4 Avant B9 USB ports
(02-08-2020, 19:36 PM)koala106 Wrote:  You need to change USB port - next make wiring from armrest to unit in glovebox (USB) and connect USB to power and line in from existing USB. I have double USB ports from Audi original from B9 if You looking for.

Thanks for the reply. Do you have some photos or electrical diagram to follow the wiring?

It's a huge job or can be done easily?

Can you give me the ref of the usb port module and cable needed?
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02-08-2020, 20:31 PM,
Post: #4
RE: A4 Avant B9 USB ports
It is middle hard work - You need one hour in car.

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03-08-2020, 08:48 AM,
Post: #5
RE: A4 Avant B9 USB ports
(02-08-2020, 20:31 PM)koala106 Wrote:  It is middle hard work - You need one hour in car.

Ok. Send me what you have.

After new usb ports it's needed to activate google auto?
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03-08-2020, 21:33 PM,
Post: #6
RE: A4 Avant B9 USB ports
For smartphone interface You need activation or patch unit.

Audi, VW, Nissan, Ford, Mercedes and many others car 
PL Menu - Lector
Language Change 
USA - EU Conversion Ford, Audi, VW
MIB 2 Harman, Technisat, Delphi
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  • paulojrc
04-08-2020, 08:49 AM, (This post was last modified: 04-08-2020, 08:57 AM by mgstuning.)
Post: #7
RE: A4 Avant B9 USB ports
(01-08-2020, 22:21 PM)paulojrc Wrote:  Hello guys my 1st thread here.
I'm the proud owner of an A4 Avant B9. I've 1 USB port and 1 AUX port under the armrest. The usb port says "charge only" so I assume that there isn't no data connection. I don't have android auto but I love to have it. I think I'll need to swap the USB port, can you show me the way? I needed some help with the new usb port module connection.
I think it's possible to add the google auto at my MMI. My version is MHS2_ER_AU_P1242.

Thanks in advance.

For Android Auto you need a new USB Port like 4M0035736 or 8W0035736 and wiring harness is different. You need a new HSD Cable to unit and the existing harness can be adapted.

After you have retrofitted the USB port you can proceed to patch the unit to get it work or you can patch the unit on table with a UART adapter.
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