Problem Nowadays, Is alot of dealerships do not accept cash and will only accept say 1k by card, so often the ap needs to be made by bank transfer. Happened with my last car as ap was too high, plus it had to clear to their account before i could collect the car.
Was on the morning of day i was due to collect though. The dealer did send me a video of the car a few days beforehand, as this was after the 1st lockdown when they was closed and it had been sitting there for quite a while. So i’d say that could be the reason but no harm in ringing mb beforehand.