Inst manual for 3.5 cliff and 791xv same?

Yes, it is by default. I don't use that feature because I don't want to wear out my locking mechanisms twice as fast. You may also want to disable the Nuissance Prevention Circuit because someone can set off your sensors 3 times and then have an hour to carefully get in your window and do whatever they please.

It won't do anything if you rock the car. You would need the tilt and motion sensor for that.

First off, the sensor should be mounted to something solid that will transmit impact force. Second, you set it so when you hit the car with an open hand, it sends warn chirps. Then hit the window with a sideways fist, fairly hard, and this should send full trigger alarm.

Usually the steering column or any other solid metal part you can get to. It needs to transfer the impact vibration to the sensor. I once tried to mount one with double sided tape which gave it "suspension" so it did not work  at all. Securely mount it to something solid.

I had to experiment with locations because my car is dynamat x-tremed from front to back so the body is very "dead" vibration-wise. My best location was tie wrapped to my shifter housing inside of my centert console. Most people mount them to the metal part of steering column.

I didn't know the automatic lockings would ruin the lock mechanisms.  How do you shut it off?