If it's like my 2015, that crank is to manually bring in the awning should the need ever arise. I found the online manual to my awning. It's a PDF file. I downloaded it to my confuser so I won't need internet to read it!
The original video I had bookmarked on the Schwintek slide has been removed!
But I found this one - don't know if it's helpful:
Actually, there seems to be quite a few Schwintek videos on YouTube...now, we just have to hope our problems arise when we have an internet connection!