LED bar light wiring

[Eskevar]

I am looking to fit a 20 inch, single row LED bar light behind the grill under the bonnet. I am trying to wire the light in with the high beam so that I do not have to switch the light on and off separately, I would like it to activate with the high beam activation. As these vehicles have the canbus system, I am concerned that it will not just be a straight wiring into the harness and use a relay to provide power directly from the battery.

I have a 2008 X5 E70 3.0 turbo diesel.

Any information would be greatly appreciated, I am located in Australia, so I don't know it that makes any difference to the wiring of the car.

Thanks in advance.