general problems of the 2005 BMW X3

I bought a BMW X3 in 2005 and noticed that when the motor is off the horn does not sound. My husband bought a BMW 3 series in 2007, and my daughter/son in law bought an x1 two months ago. And I have asked friends who own BMW's and they say the same thing - when the motor is off, the horn does not sound. This is not necessarily a safety issue but it certainly can be. My brother drives a Ford SUV in the chicago area. Last month his car slipped off a very icy road and was covered by snow almost immediately! he was really stuck and told me that if he could not sound the horn when a police officer was passing, he would have really been in trouble (cell phone was at home - of course). And then there is my not too big problem -- waiting in the car for hubby to come out and can not sound the horn. Last week I was parked in a line waiting for a train to come when the truck in front of me began to back up. My motor was off (been waiting awhile) and I had to figure out where I had put the keys, get the motor engaged and then beep at the truck -- just inches from him hitting me!.

Bought used with 105,378 miles. Husband drove 55 miles a week for 16 weeks. Parked in lot for 5 months (20 weeks). I drove it to the dealership it had 107 k on it. In an 8 hour period it gained over 2500 miles on an 8th of tank of gas. When I got it back it had 110k on it. Dealership blamed the key. Different mechanic checked nothing wrong with odometer or computer. That was January of 2015. He drove it from January to April, then parked it for the rest of the year. Got in it in December, drove 11miles round trip and odometer jumped to 115,187 from an estimate of 111k (when it was parked. ) dealership can't explain, mechanics can't explain and Bmwusa can't explain how this vehicle has gained over 6k on the odometer while it has been parked.

I'd unlocked my door and when I tried to close it, it wouldn't close like it should. It's like the actuator was stuck & wouldn't close. It does this for a few minutes of me cranking and turning off the ignition. Finally, after I crank it up again, it just closes like nothing ever happened! I was stuck in a pharmacy parking lot for like 15 minutes thinking of how I was going to get home because my door didn't close! very, very inconvenient! I almost had to call a tow truck & would've been out of a couple hundred of dollars for this!!! why does this happen!!!?! this needs to be addressed and fixed!.