I'm figuring out the telematics slowly but surely; it's not as intuitive as the COMAND system in the C43 but it responds a bit faster. VR is pretty good as well. It's really pleasant to drive and with the battery placed relatively low in the chassis it feels more planted in the corners compared to an IC model.
A friend who also has a 4xe let me know that running it in 4WD auto increases the max regeneration effect; so far I'm averaging 40 mpg.