Newbie1892, from what I gather, the waiting time for a lot of VW’ models is around the 20 week mark, however in my case, Golf mk8, it’s supposed to be around 12/13 weeks, however I just received an email from the guy dealing with my order and he says there “appears to be a delay on Golfs leaving the factory”, whether that is effecting orders of the Sharan and other VW models I don’t know, but it’s a possibility.
Regarding dealers, I do think it’s a good idea to contact them, like you, my local dealership is not very forthcoming with info, so, I think it’s a good idea to drop them an email every 2/3 weeks to enquire how things are going, it lets them know you’re on the ball.