Quote Originally Posted by creativecody View Post
I guess I'm just reading lots of conflicting info now. It even states in the owners manual that it may need to be recoded to get out of energy savings mode.
you do need to code the car with a vag, but there is a work around for a non oem battery without the "BEM" code this will reset the Low voltage display on the car.

http://www.audiforums.com/forum/b8-m...2/#post1430403
1. Viewed the state of the battery in VCDS under 19-CAN gateway > Measuring Blocks > Groups 18,19 and 20

2. Noticed that the battery state of charge was healthy at 77%, but the battery state in MMI was at 10%. This value did not change which explains why the low battery warning was always displayed. After monitoring for 15 minutes with the ignition on, the state of charge was increasing, but the MMI display information did not alter.

3. I viewed the current BEM code in VCDS under 19-CAN Gateway _> Long Adaptation -> Channel 4 -> Battery identification). The code that was stored here was different to the BEM on the battery, so i knew that it hadn't been applied.

4. I applied the BEM code in the following manner - Part number i kept the same as before, then entered the new information as follows;

- (N) Part number - (11 digits) - kept this the same as the previous battery.
- (V) Vendor code - (3 digits) - in my case VA0 for Varta
- (S) Serial number (10 digits, but leaving out the starting 3 digits of manufacturer)

NNNNNNNNNNN VVV SSSSSSSSSS

5. Restarted the car, and behold, the MMI battery state was at 100%!