Hi stripher,
Glad you stumbled on OpenXC!
Right now, the Ford firmware that we release which runs on
multiple vehicle interfaces supports
reading from the CAN bus. For the 2015 Mustang, you'll want to download the compiled OpenXC firmware from
developer.ford.com and use "Type-3." Unfortunately you won't be able to control things like the daytime running lights, etc but you will be able to read data such as the status of the headlights and brake pedal status.
Just out of curiosity, can you share some of your experience working on your BMW and what types of projects you'd like to accomplish? This could potentially lead to new features for the OpenXC platform.
Welcome aboard!
- Zac