Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Driving Sports TV" channel.

  1. 13:00 it seems that the "4WD" is only active for careful driving on snow. I think you should have tested on steep uphill on gravel or sand with full throttle. It may be that it's implemented with the same ECU that's normally controlling haldex system and it will not engage rear wheels until the front has been slipping for some time. For haldex system that was required because it uses tiny clutch pack and activating that too often would rapidly wear the clutch pack. For fully electric rear axle they could do better, though. Update: here's additional tests for the 4WD system: https://youtu.be/oxluunv9Ebg (it seems that it actually supports driving the real wheels but there's no rear wheel diff locking, mechanical nor ESP brake activated).
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