Lexus IS 250 owner

Thanks for your replies. It hasn't been hacked a far as I'm aware (I can't type on the screen when I'm driving). I use an iPhone, but I've tried a compatible phone and I still have the same problem. Any other suggestions??? Thanks again!

Hi, I have a 2007 IS250 with the multimedia DVD nav system. When I pair my bluetooth phone with the system everything is fine. However, if my leave my car off for a few hours and return the system has forgotten my phone (if i turn my car on and off after a few minutes the phone is still in the memory however). Also, another thing I noted which may help, is that when I turn the car on after a few hours the stereo turns on automatically when the car turns on (this does not happen if I turn my car on and off after a few minutes - the stereo remains off). Does anyone know of a fix? Many thanks!