This help ?
http://www.vagcat.com/epc/cat/au/A4Q/1998/219/51/2647149/
transmission case
for 5 speed manual transmiss. / transmission case / DJJ,DJR,DJS,
4 012301127F sealing plug M24X1,5
18 N 10129201 round seal 34,5X2,65 /
19 01A301125A locking cover
20 N 0123042 securing ring...