Mondeo anti theft system

[Gavb100]

Recently got a 2017 mondeo , and was testing out the alarm on it , if I leave a window open when I lock the car and open the door from the Inside the alarm triggers , but nothing happens if u wave my hand in front of the sensors inside the car even when they are activated, its set to full guard,  but only goes off if I open door from inside movement does nothing. Can anyone help me out cheers 

[unofix]

Unless you 'Double Lock' the doors - which you haven't since you can open them from the inside, the ultrasonic sensors will not be armed (assuming your model has them fitted - Not all models do).

https://www.fordservicecontent.com/Ford_Content/vdirsnet/OwnerManual/Home/Content?variantid=6154&languageCode=EN&countryCode=USA&Uid=G1685619&ProcUid=G1685620&userMarket=GBR&div=f&vCode=&vFilteringEnabled=False

I've noticed today that Ford UK have messed about with the owners manuals and are now only providing the North America online version which is misleading on a large number of points.