Extract from email from BMW UK issued at end of June on this topic. Does this help clarify the situation?
Start of production dates for ComBox equipped vehicles.
Model
5 Series F07, F10 - ComBox fitted as standard equipment, from Week 35 2010
5 Series Touring F11 - ComBox fitted as standard equipment, Start of production
In addition the following information on full postcode search capability is also part of the same document
Full postcode search capability
We are pleased to confirm the introduction of a full postcode search function for our factory fitted navigation
systems.
Option code Option name Production week Models Details
606 Navigation system – BMW Business Week 35, 2010 Any model where 606 is available Full postcode search function.
609 Navigation system – BMW Professional Multimedia Week 35, 2010 All models except X5,X6 Full postcode search function.
609 Navigation system – BMW Professional Multimedia Week 40, 2010 X5,X6 Full postcode search function.
Perhaps this feature is only relevant to the UK however.