From Ford’s website:
Hybrid Technology Efficient operation combined with dynamic style and performance. 2.0L Atkinson-cycle I-4 gas engine teamed with an electronically controlled continuously variable transmission (eCVT)
Regenerative Braking System The next-generation SmartGauge® with EcoGuide provides real-time information to help you get the most efficiency from your C-MAX Hybrid or C-MAX Energi Plug-In Hybrid