try this to see if answers your question (E53)

http://www.xoutpost.com/articles/x5/s...ctory-amp.html

If you've got an E70 then this is what you need.
http://www.xoutpost.com/pdf/e70/07b_E...%20Systems.pdf

__________________
StumpyPete



Current: gone over to the dark side of Ingolstadt due to BMW unreliabilty
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