Good evening,
It would assist if we know what Head Unit (stereo) you currently have installed in your A2. If it’s a Chorus or Concert then you will need to start with obtaining a LHD (just guessing you have a LHD) Double DIN Dashboard, which I understand to be rather rare, or a Double DIN Cage which I understand most LHD owners opt for.
If you have a Symphony Head Unit then you’re almost there, but you will certainly need the following items:
All the links I insert are just for information and I don’t have any association to the sellers.
1. You’ll need a FAKRA GPS antennae which fits the blue male socket at the back, some thing like
this, but do search for best price. I managed to get mine for about £3 inc delivery from the Cornwall somewhere. Too long ago to search eBay history.
2. You will all also need a Quadlock to insert your existing stereo connectors into, again, something like
this.
3. I don’t know what your radio aerial connector looks like like but I purchased something like
this.
If you search RNS-E Retrofit, Audi Quadlock and FAKRA GPS Antennae, you’ll come across all the above links within the results.
Once you have a Double DIN cage, or full dashboard fitted, you’ll notice that a RNS-E from any other Audi will be too large for the Head Unit aperture. It will need cutting down to size, like I done
here in post #35.
To get it fully operational you’ll need to connect a cable from the rear of the Head Unit to the Instrument Cluster. Cannot remember which pin to which pin, this is something
@timmus will be able to help you with.
Once all is connected up you will need VCDS to correctly code the the RNS-E and Instrument Cluster so they work in harmony of one another.
Our more experienced members will be able to give you a much better idea once you show which dashboard and head unit you currently have installed. It is a DIY project I tackled but did have some assistance a few years ago when I first did it (thank you Tom).
Hope this helps.
Kind regards,
Tom