Looked carefully on graphs, and don't see reasons for worry.
All looks like recession, where measured changes within measurement error (~2..3 percents very usual for such things).
Even very much looks like typical market without much grow or shrink - sales of premium brands (Audi, Benz) suffered less than mass-market (Toyota), but again, all changes within measurement error.
Need more data to make serious conclusions about possible crash.
Only could say one conclusion - Chinese always made strange things, in this case constantly grow production capacity without demand. I don't understand where they planned to sell twice as now number of machines, except if planned to supply some big war.