Hi. My biggest concern/sticking point is the size of the boot on the estate. I currently have a Passat with 600 litres of space, and the quoted reduced 350 litres in the C350e is a big difference. It's about the same as a Golf or A3. Do you find it a limitation on family trips or holidays, or is it a matter of supplementing with a roof box? Day to day is not a problem, I just know the Passat boot is maxed out come holidays and Christmas. Could be a good excuse to buy less presents and take fewer clothes!
We have an estate and the lost room is in depth, off to France in the summer and I plan to just stack a bit higher and put the luggage net up. Managed four weekend cases, laptop bags and coats etc in there so far on a work trip so pretty sure we can manage luggage for four. It is a good excuse to tell everyone to pack less though as I need room for wine on the way back!
I imagine it will be a lot smaller than your Passat though, roof box is always an option