Yes, you need to remove the pass seat(DO NOT remove harness or Airbag light will illuminate,) you have to remove the plastic trim on side, remove the carpet, the insulation (you might have to break it), and you will find something that looks like a box with a bunch of red cables going in. I cant remember exactly if its the first one for the E38, like it is in the link above. It might be second, I don't know. It can be checked with a voltmeter once is removed, not on the car. Be careful how you handle tools in that area, because is hot. You might blow more fuses.
JOY = BMW