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> It's okay to place it here.

Not if you can activate it accidentally by resting your arm.

What other controls can you accidentally activate in such a manner? The closest I can think is the e-brake pedals on the floor but even then you have to draw your foot pretty far back.

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You don't. To activate it, you have to click on the "ON" button on the wheel.

If you go from "cruise control" to another mode (off, or "speed limit"), it disables it.

Ok so accidentally activating speed limit mode will disable cruise control and you'll immediately start decelerating? That doesn't sound good.

Yes, that seems to be by far the biggest issue with it: it's a flip switch so you can easily toggle it by resting your arm on the center console, which would be especially likely when cruising on the freeway.

The “on” button on the wheel does not work if the button behind the parking break isn’t pressed.

And you can easily turn the cruise control off entirely by just resting your elbow on that button.

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