Take a video including brake application.

Not sure if e53 ever use brake force feedback like e70 does. I have mine programmed to use four lights when ≥ 1/2g braking and have wife's car programmed to engage the hazards if over like 7/10g (I forget the level)

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)