Correct, but that reference is not applicable after 03/02 Build dates where BMW went to the Universal II phone harness. I think I will stand by my position that the Voice recognition plug is present. It is possible that your car is something different from Universal II phone harness, but I think it would be unlikely.
I have been wrong before, and will bow down asking forgiveness to the BMW gods if I am wrong, but I feel confident that your car is configured with that harness that has the SES wiring.
Start at the X400 plug and work your way around there. On the X5, with FACTORY SES plug the connector is Blue with a black cap and NOT the Blue with white jumper plus as shown in that picture. That picture is the 038 SES plug, where from the factory X5s come with the
P/N 61 12 6 911 421
The x400 plug is the white 12 pin connector about 1 inch above the connector my finger is on in this picture. The grey lable says KKB and INFO on it. Trace the wires that go around that plug. Half of the wires go up front to the center console and the rest snake around the trunk area to terminate at the plug my finger is on.
Martin