These are hydraulic and there is no adjustment,if your clutch is slipping then it usually means a g/box out job,if gears are crunching or you have hydraulic leaks round about the g/box then again it is a g/box out,not sure on these but also while replacing a clutch it may be worth looking at the dual mass flywheel for replacement also if it has one,you can get solid flywheel kits for motors now and it is something worth thinking of. Good luck.
cdc, June 2014