I went to order thsi exact spec 2 weeks ago and 2 differnt dealers told me the same tha iwould be looking at possibly July 2021 as there are horrific delays especially on Premium Plus models due to the Pan roof is not being supplied to Mercedes at the moment. One told me that through the group they had 50 B class cars on order and had no build dates for any of them including one that was ordered by a customer over 5 months previous. I hope you get the car but I would be chasing for regular updates as you may be waiting more lke 4-6 months.