just_drive

When checking and replacing all CE panel fuses yesterday I found this black cable/plug lying on the inside bottom. I didn't see or feel a male counterpart but it could be buried. So, what is it and what does it control? Currently I have zero electrical issues, everything works (that I am familiar with) so I am curious. Sorry for the not so great image.
Thanks.

1989 S4 USA 100K miles

dr bob

For ROW cars with no CAT, and particularly without unleaded fuel and therefore no oxy sensor, a potentiometer goes there to adjust fuel mixture.

just_drive

Thanks. No worries here then!