Hi all,
Just a few notes regarding my install, in case anybody wants to do a similar thing:
1 - The OEM nav system (PCM1 16bit) has the same antenna plug/socket as the Clarion, meaning this was a direct plug and play deal. Saved me a load of work;
2 - The OEM in-dash microphone may be used with the Clarion, but the factory gain setting must be lowered. To do that, pry the microphone cover out, and on the right side of the speaker housing you will find a little hole with a screw just visible inside. There's a label on top, with 3 positions. Factory setting is 3, reduce it to 2. This way it will work fine with bothe the phone and voice recognition features;
3- To bypass the parking brake feature, ground the light green Clarion wire;
4 – The VSS wire may be found in two places: black PCM1 plug: grey/pink cable and in the nav/CD drive unit, also grey/pink cable;
5 – The OEM microphone cables to tap to reuse it are found in the PCM1 headunit blue plug: brown/white (ground) and white (signal);
6 – Remote amplifier turn-on cable is the red/black cable in the PCM1 small yellow plug.
7 - This unit has the permanent power and switched power connected à la VW/Audi/Porsche, so no need to switch the yellow with the red power wires.
Hope this is useful to someone.
LuÃs