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The FZD is the control cluster where the sunroof switch is located. On cars with bluetooth the there is a phone button that reads SOS. On cars without bluetooth there is no button at all. The problem is that when you install a TCU it has BMW assist equipped, which is why FZD is needed. However, this guy found a way not use FZD, which is good because FZD is expensive and VIN # specific.
The only thing is the OP did not use the loud speaker, which is in the instruction manual that he posted and he said to skip that step. Now I am wondering what is the purpose of the loud speaker and if it is necessary for full functionality.
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