I used to lurk some of the BMW forums and similarly they've done some battery monitoring and operated various modules when the vehicle was 'shut down' based on battery age and SOC. They did have some programming to indicate to the vehicle what size of battery was installed and would need to reset the monitor when replacing it. Boils down to that as the battery aged and SOC drops, various unessential modules would go to sleep much earlier after the car was shut off. Goes without saying I'm assuming the same or similar behavior comes into play with our C-Max's. With that said, haven't seen it brought up with any late model Ford's being able to modify the battery size in programming without a legit IDS.
