You have just found the "Police Pack" headlights. Mine flash continuously when I put it in gear but there is a next setting which is for the Daytime Running Lights. I use mine with a switch so I can turn these off, if required. Just change back to 'Not Fitted' to turn these off permanently.
You have me intrigued about the chimes bit though. I may have to do some more testing to see where its all going wrong.
I am not the expert on Nanocom or the settings for the BCU. I am just using the process of elimination.
Maybe someone else can look at it.

