Locking my X5 w/o setting alarm

[mstimpy8]

My alarm keeps going off randomly. It goes off in the middle of the night and its really starting to piss my neighbors off. I called my dealer and asked if the sensativity can be adjusted. They told me that it can't and its probably the motion sensor in the headliner. They didn't tell me how much it would cost to repair but I'm sure its way more than I want to pay. They told me to just use my key in the door to lock it and that will not set the alarm. I am starting to believe that my local dealer is full of idiots. I tried what they told me and it still beeps when you use the key and my alarm still goes off randomly.

So is there a way to lock my X5 without setting the alarm?