Hi
To be honest, I still don't know which system PAL/NTSC is being used. I understand as per the previous post that the format can be changed by programming (data).

This is the camera that I used, and it fits just nicely under the rear hatch to the left (or right) of the opening handle. eonon - High Definition Waterproof Color CMD Car CAMERA which are easily obtained from Ebay. I was prepared to do the data change if necessary but the camera just worked with the system out of the box, so no further effort required at this stage. I believe that the default system is NTSC and as the camera just worked, it is logical to assume that the one provided is NTSC. I believe the Eonon cameras can be ordered in either format.
My reasons for doing this mod are for connecting up a trailer. My previous car (Landcruiser) was a dream. Just back up until it goes "clunk" on the metal plate behind the tow ball. X5's are a little less forgiving to this technique.

I hope this helps.
toadhall1248