Ben12345

Hi All, I have a 2005 1.9Tdi (AWX) Superb. I've noticed in the last few days that the garbox is getting harder to change gear sometimes and feels notchy where it hasnt before. IS it worth getting the oil changed in the 5 speed manual box? (Its never been done as far as I know) The car has done 165,000 miles. Also, how is the clutch etc lubricated? Is this a different source of oil from the gearbox? (Clutch and Flywheel were changed about 4 years and 50,000 miles ago) I nortced today on a steep incline that the clutch didnt seem to bite for a few seconds and there was a smell of burnt clutch material after pulling off from a stationary position. Any advise greately appreciated,