I drive a 2004 VW Passat B5.5 that I bought used with quite a high mileage so it has therefore had a relatively large amount of usage (at 118k miles). I am curious to know how to tell if the clutch is going bad in older cars because I cannot guarantee that the clutch, a part which would be subject to heavy wear if a previous owner did not know the consequences of riding the clutch, would always have been treated as I try to treat it myself (not riding it).
What are the common signs to look out for to be able to identify a worn out clutch?
Will it go suddenly or is it gradually going to get worse?
I realise this one is probably subjective, but roughly how long might you expect one to last?