When I hit the accelerator in 5 and 6 gear the clutch slips and the revs go through the roof. It's been suggested that I need to replace the clutch at a mind blowing cost of €1675 but as I can rev up a 10º hill near me in first, second and third without the clutch slipping I'm not convinced I need to replace the clutch. Is there a computer glitch that disables the clutch although how it would do it beats me.