My understanding is that the production is happening at the Düsseldorf plant in Germany. You can watch the YouTube video if you are obsessed like myself at:
According to my dealer (not verified independently) the 4x4 Sprinters won't be disassembled and sent to Ladson, SC like most Sprinters all. Instead it will be shipped complete from Germany.
I don't have a good estimate on the shipping time yet - it looks like it will be weeks though. My dealer has told me that once the van is "on the water" that delivery dates become quite reliable to predict.
My van will be delivered directly to Sportsmobile Texas - as you can expect I am really looking forward to it!
I see you have one coming too. Have you asked them to look into the system and get your scheduled production date yet? To be honest I'm not sure it helps knowing, but I'd be interested too.
FYI the reason I ordered from Miami even though I live in Idaho is because I figured they wouldn't have used up their "allocation" of 4WD units. I was right