2007 Mercedes-Benz Audio 20 Bluetooth Integration

This is a rather superfluous mod for the MF2750 radio; those wanting the quick route should just either buy an AUX Cable or a ready made Bluetooth Module:
AUX Cable (~5$) : ebay.to/2siPMzG
Bluetooth Module (~25$) : ebay.to/2xoc5c9
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Warning
For the best functionality, you'll need to program the Bluetooth Modules; for that, you’ll need a 15$ CSR USB SPI Programmer, and some quite decent soldering skills. Otherwise your module will advertise itself as having a microphone, and you'll have to toggle your phone off of bluetooth when on calls, which can get quite tedious after a while.
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One you do get the programmer, you’ll be able to deactivate the features, and have a cool Bluetooth Name, AAAND have it connect to your phone automatically at powerup
CSRA64215 Modules: bit.ly/2JdVv3p [I strongly recommend getting the 5V one and using either a linear / buck regulator to step down the car’s 12V - which usually is more like 14.5]
If you have any question about all this (I haven’t been quite exhaustive), hit me up in the comments.