I think the Avant intelligently has the built in microphone located centrally, the 2 android units I have had in my E53 and E83 had/have the microphone on the left hand side of the front panel, adding several inches from the driver in our right hand drive vehicles.

__________________
Neil

2016 X5 3.0D
2009 X3 3.0D
2005 X5 3.0 Diesel Sport (sold)
2007 320i (sold)