Have you tried Audi parts dept. Got a price from them yesterday (about £93 ish can't remember exactly) for my A4 3.0 quattro. That was before any discount you may be able to negotiate. Not much to go by but it is cheaper than Halfords. Might be worth a try.
Does anybody know how long the warranty is with a genuine battery?
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A4 3.0 quattro sport avant B6
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