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      12-25-2012, 01:37 AM   #22
Major General

Drives: 340i M-sport AT
Join Date: Mar 2006
Location: Chicago

iTrader: (1)

Originally Posted by clarence View Post
DTC is subset of feature within DSC (it only deals with traction & not cornering stability). If u press & hold the button for not more than 10s, the DSC (incl DTC) is deactivated. If u just press the button once then the cornering stability part of the DSC is deactivated, leaving the traction control part (i.e. DTC) on.
It's all in pages 111 & 112 of the owner's manual.
DTC is a "mode" of DSC.

With DSC fully on/active, there is stability control and traction control.
Press the button once and release turns DTC on, "Traction" appears on the gauge cluster.
*DTC is not on when DSC is fully active. When you press the button once and release you are not deactivating DSC, you are switching it to DTC.
So pressing the button doesn't leave DTC on, it actually turns DTC on..

DTC is "dynamic traction control".
When DTC is active it allows the drive wheels to spin.
Also, there is still stability control during cornering, but at a reduced level.
With DTC on, the system allows the driver to play a bit more, like swinging the rear out, before the system intervenes.

To turn DSC completely off, press and hold the button until the sliding car icon and "off" are displayed on the gauge cluster.
With DSC completely off there is no traction or stability control.