[JohnS4]

Is it a 12 pin connector? Should be 8E0 972 112B. It’s the same plug used for the rear parking sensor connector.

 

[JohnS4]

The third connector will be ground/earth. The second one is +12v, this will slot into the fuse block from behind.

 

[JohnS4]

Just a guess, the 5th plug might connect to the gateway to pick up the CAN bus. If that's all its doing you can splice into the CAN, you don't need the plugs (unless you want to remove it at some point then its just that bit easier to do)

 

[JohnS4]

It could be for the switch lighting, again this is just a guess

 

[JohnS4]

If you translate the text from the PDF you posted…

“It is important that you have installed the correct comfort control unit (STG46). You can code the rear spoiler in every STG, but it doesn't work for everyone. My experience is that it works with the STG 46 with CQ in the end.”

 

[JohnS4]

Which CCM do you have fitted?