If you have purchased the 17 MM allen wrench then
consider doing this:
I cut approximately 1 inch off the short end of
the L and use that piece to get into the space
that is between the exhaust and the plug . Take a
look at the distance and  figure out just how much
you will need.
Then from here on out you have your special 17 mm
front drain plug tool and it will work on any VW
or Audi
transaxle  drain plug. You will still have a
viable tool with what is left of the allen
I know that this is not optimal,I would rather not
cut up a new tool but I have not found a separate
allen tool for this application. I used a hacksaw
to cut the allen . Take your time and try to make
a nice straight cut.  I might get flamed for
cutting a tool but I have never used the 17 mm
allen for anything other than transaxle drain
plugs and now I have exactly the tools that work
for what I am trying to do. Good luck!
Tom Czerniak   Lurker at large!    87 Westy