joshperry

Sorry to necro, but this is high on google for this retrofit and there is a TON of old information clogging up the searches. I am attempting this mod on a 2017 A3 etron (MQB platform I guess). I'm ordering an ACC stalk and a coder. I met someone in another thread who says they can remote enable ACC, bypassing FEC/SWaP shennanigans, to make use of the factory installed MRR gen3 radar installed for presense... We shall see.

As a side-note, I'm doing this so that I can get full compatibility with comma.ai's openpilot.

adnanklink

I would still really like this to happen, so by all means. Let us know how it goes!

-Adnan

joshperry

Just bought: https://www.ebay.com/itm/303671468497
The key search for the stalk and wiper setup is: 8V0 953 502 AD

joshperry

Well, on closer inspection. Strike that. My previous link is to a slightly older version of the stalks. This instead: https://www.ebay.com/itm/154040539790

The key word you want is 8V0953502BD

joshperry

Stalks arrived from Germany, slow but well protected. Have to move next week, so won't have time to do this for a bit.

Levon van der Veen

Im really waiting on the outcome of this. I have a 2017 A3 with lane assist and front sensor for pre sense and pedestrians. I’m hoping if this works I can do it on my car also.

Levon van der Veen

it is possible. I only changed the stalk and someone coded it for me. I now have acc working also with virtual cockpit.

braveaudi

It's an old thread, but just in case someone is still looking for the solution - ACC retrofit is possible. I'm talking about MRREVO14f, aka the Gen 3 ACC. Aside from the required hardware (front radar sensor, ACC stalk, ABS sensors installed beside rear wheels, etc.), the following software changes are also required:
1, coding and adaptation in engine, ABS, instrument cluster modules, and ACC itself of course
2, proper parameterization - this can be done with ODIS or VCP, but you need the parameterization file first
3, FeC codes needs to be inserted into the ACC radar module. There are more several FeC codes that stand for different ACC related features (at least 4), ACC with stop to go being just one of them. If your car only has pre sense, then only the pre sensor FeC code is enabled in your ACC module. Inserting FeC codes in the module is not just coding/adaptation change. A very long HEX code needs to be computed from VIN + FeC code + datetime and signed with a private key which is owned by VW (the private keys differ by ACC hardware part number and firmware version. Some of them are already leaked). The long HEX code will be transferred to the ACC module via ODIS, then the module verify it with its public key and enable the feature.
4, remove component protection. This is probably the easiest step as long as you have access to Audi online account.

There are several means to insert the FeC codes and step 3 is just one of them. It's not easy to do those steps on one's own unless he/she is super experienced in Audi retrofit and got all the required HW/SW/online access.