Did this on my 2020 S7. As you know coding can’t disable start stop as it’s built into the lower screen. In my search. I found sellers on AliExpress advertising for roughly $30, a plug n play module to disable it. Well it works! Took 30min to install.
Where to buy:
Here’s the link, but any one will work if you search up this “audi c8 start stop” https://a.aliexpress.com/_ms3m6x0
Features of it:
When starting car it defaults start/stop off. That’s it lol. Start stop still works if you press the button. But it will always default off after ignition cycle.
FYI there are risks to installing random things off the internet. So be vigilant lol. In my case. This hasn’t affected any other functions of the car other than the intended. So far so good.
Here’s how to install it. It gets installed under the backseat:
1. Remove the back seat. Here’s a link to instructions https://imgur.com/a/Ixv1riI
2. Find the black module. Under some clear plastic in the center.
3. Remove the two hex nuts, it comes with the tool.
4. Remove the black connector harnesses. Along with the white clip that locks it in place. As that will interfere with the new module.
5. Take the oem black harness and plug it into the new module. NOW. It can go in both ways. So insert it in the direction with the least resistance. As mine had no label. If you insert it in wrongly. It is so hard to take apart. If you insert it correctly you will hear a click.
6. Plug the new module into the oem module and lock it in place.
7. Put it all back in reverse order. There is no good place to place the extra harness wires. So just let it rest on top the factory module. If you sit in the middle seat you can barely feel the extra wires. But that seat is uncomfortable as is. So who cares.
If you want pictures of certain steps lmk.
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