1) It's illegal because when you odometer on a vehicle you're tampering with the mileage to make it appear lower than what it actually is.
2)Flashing your high beams is due to oncoming traffic or to alert the drivers. But it can mean different things.
4) Locking your doors while drving is good idea because i feel like it's safer if you have kids and less likey to open in an a collision.
5)Simply because, power brakes are more powerful than standard breaks.
6) If you see your break light on, you should instantly check your break fluid and check your break pedal by pressing it hard to spot any indications of air or fluid.
-Hope this help, couldnt answer three.
