As above, can't find it anywhere and I have a puncture I've tried putting a bigger socket over it to find that the key nut has a protection from this - a collar that turns round lol (clever Audi !) I've looked on Ebay and noticed that they do sell them, but the description states different 'key code letter's'. The ones on ebay being Q and S - how am I to know which one I need? The nut in question look's just like this: I know Halfords sell a nut removal - a socket with a reverse thread that cuts into the nut, but i'm not sure it'll fit. Help please guy's!