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      01-31-2013, 12:11 PM   #11
SANguru
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Drives: i8, X5 50,M550i,Tesla, MP4-12c
Join Date: Aug 2007
Location: Bay Area, CA

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you sound like you have never done a tune before??

good tunes nowadays are fully removable in the N54 world and should be the same for S63/N63. Data logging functionalities will tell you exactly what's going on and through CAN tools you can remove fault codes... Reliability? I am more concerned with the drivetrain but time will tell..
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