I do have some concerns in regard to keyless entry which I can see becoming the norm in the future. Nutshell: insurance company would be less than keen settling any claim where "the car just took off & crashed itself" or "it unlocked itself after I locked it", owner / drivers of vehicles with such features will tell you exactly how it is.....
Hello Gene:
You don't have to worry. Keyless access has been around on VW products since 2003. To put that in context, when VW first introduced keyless access (KESSY), Windows XP was the current OS and it would be another 3 years before Apple introduced the iPhone.
The logic behind keyless access is quite clever. If you lock the car - either by using the button on the key fob, or touching the lock position on the door handle - and the car subsequently receives an unlock signal, either by using the unlock button on the key fob, or touching the unlock position on the door handle - and no door is physically opened within 30 seconds of the car receiving that unlock signal, the car will automatically lock itself back up again. Go ahead and try it.
In the early days of keyless entry systems, thieves could recover a signal from the key fob stored within a house and use that to open a vehicle parked outside the house. Beginning with the MK 8 Golf, the key fob itself has a motion detection system within it. If it has not been moved for a period of time (not sure how long, probably 5 minutes or so) it "turns itself off" and will not unlock the car. You can try this feature out as well if you park your car in a garage at your house. Leave the key fob sitting on the roof or hood, go away for a while, then try opening a door using the door handle. The car will stay locked until you pick up the key fob and shake it a bit.
Lastly, if you leave a key fob inside the car, and you lock the car up using a second key fob, the fob you left inside the car is deactivated and will not work anymore until the car is unlocked in the future using the second key fob (the one used to lock it up).
So, no worries...
Michael