I believe MB install a home charger as part of your package but you need a drive, garage or dedicated parking space. Ive read somewhere its either a podpoint or bp pulse charger, do your homework as personally I think the former is better (tethered version is 7.5 metre cable as opposed to 4.5m, also podpoint app slicker, podpoint bigger network too)
https://www.motability.co.uk/contact/faqs/are-there-any-electric-vehicles-on-the-scheme