S3 Pollution Plus+ Edition
Get a second opinion from a good independent specialist garage. If they diagnose gearbox troubles then i predict this face --->
Sticking clutch would normally mean slave cylinder i think.
Could be a bunch of things though, organic material may have come off the rivets, could be down to the rivets even and its just scratching them to death, causing excess heat - heat does funny things.
Eitherway, gearbox off i think!
labour to remove gearbox and fit new clutch and re-assemble. (excluding parts) £300.
Do not let them charge you much more...
Obviously parts on top..
2012 Ibis Black Edition S-tronic S3, 3 Door, Shark Stage 2, MTC Intake Kit, Powerflex Fast Road Dogbone Mount, Full Non Res Milltek Exhaust, Forge Development Intercooler + DV system,