I’m hoping someone can at least narrow down the issue

A few weeks ago I swapped the battery in my 06 A6 and since then the Audi MMI will not work.. splash screen comes on then goes right back off..

I have tried the 3 button reset and nothing

Does anyone have any ideas how to fix this?

Everything I have red so far leads me to believe it could be the coding on the battery but I have no idea.

My bmw did this, luckily I was able to purchase a supporter cable and code the new battery in myself. Best of luck on your resolution!

Use a vagcom to diagnose the problem.

gl