Please lets discuss everything about audi/vw cars here. Including verified mechanics and genuine spare parts dealers all around the country.

I always advise all users to get a scantool as cheap as 15k to enjoy your car. so that at any pop up of check engine light you can scan and check to see if its a minor or serious fault.
ive used my A6 for over 3yrs without any repair other than normal maintenance. which include pads change, oil and filter change, general suspensions.
My drive gear has gone into safemode like 3ce only to discover through scan that it was just a minor issue that has nothing to do with the gear itself.
I fixed it myself. just resocketing of gear connectors.

In case you transmission issue on 1998 upwards model you can holla me. I dont fix hardware but probably tell you what d issue is.

www.nairaland.com/810561/audi-volkswagen-issues-resolution-thread

A thread on that topic exists.