Oh cool, I didn't realize the system was even more active than I thought. Good info.If you enable the Power Distribution visual on your dash, you can see when power is applied to 2 wheels vs. 4 wheels. I find that 4A engages all 4 wheels at all times of acceleration and cornering. If you're just maintaining freeway speed, power will only be applied to the rear wheels. Give it the slightest touch on the accelerator though and all 4 wheels engage.
4A can be used all the time and at all speeds, and I often forget it on, however, I do try to use it only when roads are wet or if I'm in Sport mode. You can engage and disengage 4A at any speed.
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