Originally Posted by Qsilver7

Run your VIN (the last 7 digits) through one of the multiple VIN decoder sites...you should see option code S524A listed. The adaptive headlight option came with the bi-xenon headlight set-up on the facelift e53 X5s in the US market. In some markets you could also have regular xenon/HID or halogen headlights that did not come with the "adaptive" feature.

Here's a VIN decoding site if you don't know one off hand: https://www.mdecoder.com/