After market radio is out original radio is in iPod cable in the blue plug and no empty hole for steering wheel control?So you have taken an aftermarket out and now want to put the factory stereo back in?
yer im seeing what your saying but cant see anything on that list about steering wheel control just cant undrstand where this plug has come from it seems to go to the steering wheel controls.That black plug doesnt look like factory connector and needs coming out to my knowledge. All the plugs (3) That you have connected to the factory stereo are all that are needed for it to work properly
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CCU(*) Connector (C1 on the diagram) = Central Communication Unit. This is the way the HU receives stalk control commands and sends information to the dash display.
no..i think your misunderstanding. That plug that you have left over is not factory standard. If your returning it back to factory then i suggest you trace the connector back and try to remove it.