Here collect some repair solution for Audi A6L 3G navigation trouble,please try it at your own risks.And for Audi A6 repair,please check here:Audi A6 repair projects.
Trouble 1:Audi A6L 3G navigation screen black can not display.
Solution:Remove J794 driver and module,then measure the current
If the current show 0.65-0.7A,it may mean data damaged,recommend you re-write GL512
If the current show 0.7-0.8A,it is recommend you to check A5 processor
Trouble 2:Audi A6L 3G navigation is initializing,but SD card can not be loaded
Solution 2:
1.Replace 40G driver and rewrite data
2.Replace GL512 chip data
Trouble 3:Audi 3G Plus navigation loading and stop the process at 11%
Solution 3:
1.Replace 60 driver,and rewrite data
2.Replace GL512 chip data
(when 3G plus loading process at 11%,it will caused recorder can not read CD.)
For Volkswagen repair,please check here:Volkswagen Repair Cases