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      07-01-2011, 01:56 PM   #17
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Drives: X6M | 1M | SOLD E90 M3 VT2-625
Join Date: May 2008
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Originally Posted by Red135 View Post
How is that possible if the OEM software is overwritten?
It's all considered when ESS creates the tuned file for your car. The existing features of the stock car are maintained, example the "M" button. If you need more technical explanations then I'm sure ESS can directly answer your questions.
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