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      03-29-2013, 08:20 PM   #1
Ti-Jean
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Drives: 08 E90 M3 DCT
Join Date: May 2011
Location: SoCal

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2008 BMW E90 M3  [4.50]
Data showing Euro MDM applying brakes

I thought I'd share some data that I collected about euro MDM "interference" on track. I'm not looking to start a debate on the benefits or not to keep MDM on track, just wanted to share some hard data on what it actually does.

Here are 2 videos with associated data taken on the same track, same day, same driver, etc. Only difference is maybe 1 hour apart.

The short conclusion is that MDM will apply brake at individual wheel even if the car is not sliding. I could have understood this wrong initially but I thought that MDM would only kick in after some slip angle was reached by cutting throttle and/or applying brakes.

If you watch the following video, you can tell when MDM is doing something by looking at each wheel brake indicator (bar next to each wheel of the race car). If they light up whithout the brake pedal engaged, MDM is acting.

Few laps with MDM on (Euro MDM) example of MDM kicking in at ~1:03 and ~1:15:


Few laps with DSC Off for reference:


Here is a quick picture showing what to expect when MDM is acting in the first video.
Attached Images