Xdrive With Dsc8 - BMW E61 Sports Wagon 530xiT Owner's Manual

xDrive with DSC8+

From 04/2005, the BMW 5 Series wagon and sedan (optional) will have all wheel drive
capability utilizing the tried and tested all-wheel drive system xDrive of the X3 and X5.
The innovative all-wheel xDrive is a system for controlling and regulating the "infinitely"
variable drive torque distribution over the front and rear axle. The xDrive uses the system
functions of the DSC to positively influence the vehicle handling by specifically distribut-
ing the power in the event of understeer or oversteer.
With the controlled multi-disc clutch in connection with the xDrive it is now possible to
resolve the conflict between traction and vehicle handling.
This is been achieved in that the xDrive does not predefine the torque distribution by a
fixed transmission ratio as is the case with the previous systems. Instead, distribution of
the drive torque is dependent on the clutch lockup torque of the controlled multi-disc
clutch in the transfer case and on the transmitted torque at the front and rear axle.
Driver Benefits
In addition to the previous functions, a series of additional safety and comfort functions
will now be available to the driver with the introduction of the DXC8+ in the E60/E61.
The expanded DSC8+ functions include:
• Dry braking
• Brake standby
• Automatic soft-stop
• Fading warning and assistance
• Drive-off assistant
• Hill descent control HDC
Besides the outstanding chassis characteristics of the BMW 5 Series, the all wheel drive
system offers traction advantages not only on snow and ice but also on unsurfaced
roads.
Note: Because many system components and functions and are shared
between the xDrive and DSC8+ system, they will be discussed
together in this section.
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E61 Sports Wagon