Hi Phil,
Nice to see you in the forum. I'm afraid I can't answer your question in any detail whatsoever but I'm fairly sure there are only 2, one in he A8 and the other in the S8. The S8 is certainly more rev happy than the A8. I know that is the case for the face lift models but not sure about the pre-face lift. Hopefully someone else and clarify in more detail.
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Currently driving - '99 Silver A8 D2 FL 4.2 QS
Currently for work - '08 Raven Blue T5 174
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