Diagnostic connector, since September 2007 (Audi A4 B7)

14-1 Power supply, diagnostic interface
*See diagnostic diagram, ring interruption
** fiber optic conductor, ring information bus
***See ECM diagram
#/# # Up to 2009 issue. (inclusive)/since 2010 issue V
# # # See CAN bus diagram

14-2 Diagnostic connector
* System "Lane assist" and "Side assist"
**/*** See SRS/ECM diagram
# gradual implementation of J 533