You do not need a TV module now-- that is optional.

Unless you also want to upgrade your audio at the same time, you do not need to add any amp. That is independent of the nav retrofit.

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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