Whats this for?

[Crafty flower]

When I’m park mode and toggling left shifter it decreases and increases space.. what is this feature for??

 

[Javitos]

Have you tried to read the manual?

 

[Mr. Wonderful]

It looks like it may be the indicator for how many car lengths you want to distance yourself from the car ahead
when in cruise control or using autopilot.

 

[Gadget63]

when you are on auto pilot, if you move the right thumb wheel left or right, you increase or decrease the following length between cars.