Hi Guys, I have but a 2005 TCU (ECE/GSM model) in my 2001 X5.
I have the S640A Telephone preparation and no other phone related codes.
The TCU came from a working 2005 X5.
What code should I have to apply to my 2001 X5 as the Bluetooth function is not working currently?
I can make emergency SOS calls from the TCU and when I hold down the Voice button on the steering wheel I get Voice Commands in German.

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X5 2001 4.4i E53