Are there SAP supported Automotive add-ons?
There is a group in Germany that has developed many additional functions for automotive implementations.
These Automotive Consulting Solutions (ACS) are published at
http://www.sap.com/germany/campaigns/2010-10-automotive-acs/en/index.epx
These have been implemented at numerous NA customers. There is a fixed cost for implementation, documentation, and support.
I prefer http://www.sap.com/ACS resp. http://www.sap.de/ACS 🙂