Mercedes Benz Audio 10 CD - Bluetooth Integration (inelegant)

Much Better Approach:    • Mercedes-Benz Audio 10 CD - Bluetooth...  




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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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This is a rough and ready approach to adding bluetooth to ANY radio of ANY kind - it unfortunately suffers from some pretty significant downsides, such as not having any volume control on the radio, as well as not having any equaliser / fader options available for the BT/AUX input. All these are issues are rectified in the newer approach, linked above.

Parts:
Buck Converter w/ Enable: http://ebay.to/2FFHKZB
12V CSR8645 Bluetooth Module: http://ebay.to/2IfjVq9