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      09-12-2009, 11:20 AM   #55
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Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

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There is a sticky thread on this, so I merged your question into that thread. The first part of your question has been discussed here. As to wear on the brake system, you'll get more additional wear on the brake system to the extent that it is intervening. So, instead of your foot doing the braking, the computer is doing it. And, you do get uneven (and possibly more) pad wear (and you can say rotor and caliper wear) as a result. One can speculate that you would run higher rotor/pad temperatures as well. I don't know the specifics of how the computer executes MDM braking and if there are additional mechanicms that see use when MDM kick in that are not normally used.