I have done the mod on my A4 with an after market Multi Media Interface
You can add an after market Media Interface eg like XCarlink.
http://www.xcarlink.co.uk/product.ph...3&cat=4&page=1
The media interface will sit between your Symphony/Chorus/Concert HU and the stock OEM LCD screen.
The cable going to the LCD screen will be plugged into the after market MMI.'
The after market MMI will come with a similar cable to be connected to the stock screen.
With the after market MMI U can add a host of items for eg. Garmin GPS GVN53, Reverse Camera, DVD Player/Changer, Digital DV, etc.
Changing of the different screens i.e Stock Displays, GPS, DVD, Digital TV, etc. will be as if like oem by pressing & holding the Mode button on your steering.
The only thing U lose will be your auxilliary input.
The auxilliary input will be the sound input(DVD, Digital TV) from the after market MMI to your sound system
For better resolution for your Garmin GPS GVN53, U need to make a RGB cable to connect to the after market MMI which provide a RGB input for GPS Navigation.
The GVN53 will come with a Radio Hz Remote Controller - IMHO though clumsy in the beginning but will be a breeze once U get used to it.
The GVN53 will come with an external speaker and provide the sound for Navigation. In this way U can still listen to your radio, CD, DVD while on the move.
The GVN53 takes a SD card for your Garmin Maps
https://buy.garmin.com/shop/shop.do?cID=134&pID=10573
The reverse camera will be switched on to your stock screen whenever U reverse.
Any after market reverse camera can be fitted - They are usually in NTSC format.
Here are some pictures of my installs! Hope this helps!
The Garmin GVN53 Black Box size is small 4.7"W x 1.18"H x .4.6"D
The GPS antennae located on the left hand corner of the windscreen. Heavy tinting of your windscreen might have to locate the antennae outside your ride
The familiar Garmin GPS Start Screen
A typical GPS Map View - Turn by turn & TTS (Text To Speech) Available. GPS Audio is by it's own speaker box. This way U can still listen to music with the stk system
& still has GPV Navigation at the same time.
Digital TV reception & picture quality is pretty good especially on the highway even at high speed.
All screen changes on the MMI is via the Mode button on the steering wheel
On my setup the screen changes OEM **> Garmin **> AV1(Dig TV) **> AV2(DVD/USB) **> AV3(iPod/iPhone)
Reverse cam is turn on by reverse gear regardless of what screen U are in.
Digital TV reception & picture quality is pretty good especially on the highway even at high speed.
Reverse Camera from Alpine - Picture quality actually looks better than in the photo - Very clear
iPhone/iPod Dock - charger & capable to play music through the car stk sound system or play movies thru the MMI.
Playing Songs or Movies from USB drive that came with the DVD Player
Watching DVD
Bookmarks