Is there any way to have the park assist system activate automatically if your going less that 5 mph?

Pulling into my garage, I want the front senors to turn on automatically.

 

I don't think so.
When I pull into my garage I hit the button on the roof console to turn the sensors on.
Yes, it would be nice if they turned on automatically when pulling into the garage, but think of the hassles in bumper to bumper traffic!
I'm pretty sure this is why they are configured not to turn on automatically.

 

I put a sign on my wall that says; 'STOP NOW!"..Works everytime

 

It's not for me, I back into the garage. But my wife can't seem to master that and ALWAYS is way to close to the tools boxes (sometimes too close)

 

No, only by pressing button on roof console

 

I just placed some 2" solid concrete blocks on the floor on each side tire width and bump them slowly when pulling into garage.

 

You could try something like this: