Hi...
My Van is a 2012 Caravelle Exec. BiTDi DSG 4Motion, the Webasto sticker on my door frame, is exactly the same as the one posted, except, mine is a 12v / 26W.
I was hoping, I could buy the parts I required and then 'Plug & Play', but I didn't take into account the software adjustment.
I may have to contact "Advanced In-Car Technologies", and ask for their advice (cost)
Thanks again for your help.
Regards.