Was reviewing specs on the 2009 550i. Stated there are front and rear ADJUSTABLE STABILIZER BARS. Does anyone know how this is done? Thanks
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Specifications:
Drive Type: Rear-wheel drive
Transmission Type: 6-speed automatic
Engine Type: V8
Displacement (cc / cu-in): 4,799cc (292 cu-in)
Redline (rpm): 7,000
Horsepower (hp @ rpm): 360 @ 6,300
Torque (lb-ft @ rpm): 360 @ 3,400
Brake Type (front): Ventilated disc
Brake Type (rear): Ventilated disc
Steering System: Speed-proportional power steering
Suspension Type (front): Independent, MacPherson struts, coil springs, lower control arms and adjustable stabilizer bar
Suspension Type (rear): Independent, multilink, coil springs and adjustable stabilizer bar
Tire Size (front): 235/35ZR19 Z
Tire Size (rear): 275/30ZR19 Z
Tire Brand: Continental
Tire Model: Sport Contact 2
Tire Type: Performance
Wheel Size: 19 X 8.0 front -- 19 X 11.0 rear
Wheel Material (front/rear): Alloy
As tested Curb Weight (lb): 3,998

 

It likely means the car is equipped with ARS (active roll stabilization), aka active sway bars.

 

Trying to figure out why front end on a relatively straight road at 90-100 mph shuddered once left then right and then the same again all with in 2 second. Felt the front end wobble and then the anti sway brought it straight and true? Is that normal?

 

Don't know. My car doesn't have ARS. Perhaps someone with an ARS equipped car can chime in.

 

example of what it does.

 

better video here

 

So your saying this car freaks out while under way without me as a driver even getting a clue at speed and rolls for some reason? If I put a ACS or Hamann Spoiler on the rear deck will it eliminate this rolling / sway in the front end? Good stuff! Grats.