Type 44 trivia contest

[DeWitt Harrison]

While poking around the trunk of my '88 5KCS, in pursuit of space for rear
speaker enclosures, I came across a part I could not identify per function
or even system. It is of interest not only for the sake of pure science but
because I may want to move it and would like to know why it is located
where it is.

It's a soup can size, hollow black plastic cylinder with one end dome
shaped and the other flat with a black rubber vacuum line connected to a
nipple. It is mounted to the rear seat bulkhead, by a metal bracket, near
the left-rear seat belt reel. The black hose runs forward from there and
soon after it is forward of the bulkhead, it transitions to a small
diameter (3mm?), rigid, white plastic tube similar to the tubing used in
the vacuum controls for the a/c vents, etc.. This tube then runs under the
rear seat, toward the car center, to the transmission tunnel at which point
it bends frontward again, and runs toward the front of the car, under the
carpet along the tunnel. It seems this soup can component could have easily
been located under the left passenger seat area.

So far, I have not gone to a lot of effort to find out where it goes once
it reaches the general vicinity of the center stack of the dashboard. Can't
find it in ETKA so far (no part number search in there I'm aware of) in
relation to either the central locking system or A/C control. The Audi p/n
on the part itself is 049-129-808-A.

Major guru points to the person who can identify its function and the
rationale for its trunk location!

Best,

DeWitt