Electric Recaro's. What is the black plug for???

[S3_OL]

Hi, I have just had a look under my Recaros in my 2002 S3 and there is a red plug (power for electric motors?) and a yellow plug (airbags?) but there is also a black plug which is not connected. I have had a search through the forum and it seems that everybody heated seat plug is green?Is there anything else that it could be used for aside from the heater elements?Thanks

 

[ijgreer]

Optional ejector seat switch

 

[S3_OL]

Good job I didn't put power to it then!

 

[bigray]

memory seat ?

 

[S3_OL]

Thinking its a pressure sensor :/.