Such as? What kind of more powerful or more modern update are you looking for?

The screen is just that, a dumb device. Many people upgrade the 4:3 display with the higher quality 16:9 display. Other than that, there is not much else to change.

Now, moving to the trunk, you can do lots of modernizing updates. For example, how about updating to the DVD-based MKIV navigation computer. While you are at it, you can upgrade the radio module to add new features and Aux input. (You can also add Sirius in the US market.)

If you want something louder, you can pull the amp and install an aftermarket amp with more juice.

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input