Sorry – but its not clutch release.
Its DMF – Google Dual Mass Flywheel.
My 1.9CDTI Vauxhall had it = new clutch as your in there so may aswell. 6 hrs labour + DMf at 250.
My bill was £900 from a local garage.
Mine started only when cold but developed over a few weeks – in the end it happened when warm but every time the clutch was pressed.
Ive also had 3 alternators, 3 EGR valves and im due the car back after swirl flap failures at £500!
Never buying a vauxhall ever again.