I've had the idea of retrofitting a smart with CCS for a long time and have failed so far, among other things, because I don't even know the CCS protocol. Now I stumbled across the fact that a established provider for conversions to electric drives also has a product for CCS.
This would "only" leave the question of how to convince the smart to accept the charge instead of starting error codes.
So I'll throw this topic out there:
With £ 3,300.00 certainly not a bargain, but then on the one hand the CCS controller is already included and on the other hand the CCS socket. There's also great documentation, which I've also attached here.
CCS Type 2 User Guide Zero EV .pdf
And just to touch on the topic:
Personally, I wouldn't want CCS because I want to charge the smart faster than the AC 22 kW, but simply because it's becoming increasingly common on long-distance journeys. Maybe going up to 30 kW, which the battery packs according to the specification. But my primary concern would be simply to have more choice of charging stations and not to be affected by the fact that type 2 on the motorway is disappearing.
If any of you want to dedicate yourself to the topic, please let us know. I can't do it alone, but I'm very happy to help where I can if someone wants to tackle it. 
