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      02-11-2014, 03:02 PM   #11
dhirm5
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Drives: 2014 M5 ZCP, 2014 X5 35d
Join Date: Dec 2010
Location: Bethesda, MD

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Quote:
Originally Posted by clubcsl View Post
It is called servotronic.
Invented many years ago (I recon in the E32 7 series).
It regulates the pressure of oil sent to the steering rack.
Long as this zombie thread is back anyways, I've wondered for a bit - do the the difference steering settings - comfort/sport/plus - alter the steering ratio as well as the effort, or just the effort?

I haven't been able to discern a difference in ratio while changing through them.
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