After some reading on the CDR 23 (vs. CDR 220 in the older Boxsters), I understand that the CDR 23 is a different unit using the MOST bus and cannot just be swapped out with a CDR 220. In fact it cannot be swapped out easily with a aftermarket unit since it uses the MOST bus and one has to end up upgrading, the head unit, Amp, speakers...the whole lot. Which may not make sense for most people. So in an effort to see how I can add either the 3.5 mm jack input or Bluetooth input to the CDR 23 I have found very few options. One of them is sending the unit to Becker who would hard-wire a 3.5 mm jack to the circuitry. Also the interesting part is that I have learnt that 'this' upgrade from Becker is a 'mono' upgrade'. Will be calling Becker again to confirm.
Question: So in trying to understand the above and coming up with options I have a question:
Does anyone know what the unit above the radio does? See attached pic. The unit below is the CDR 23. What is the unit above that and its function? It has two connectors to it at the back that are used and 2-3 that are unused...
Please help! Thanks.
