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Old 12-07-2012, 08:36 AM
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cordoor cordoor is offline
cor door sedan
Location: Utah
Join Date: Jun 2012
Posts: 1,095
Mein Auto: 2013 550i xDrive
Originally Posted by wayner44 View Post
With the 535xi Do I have to add on the Dynamic Handling Package for the suspension to actually adjust? Or does it have the ability to do this without DHP
You need Dynamic Damper Control to be able to adjust the suspension. This is available as a stand-alone option for $1,000 or as part of the Dynamic Handling Package for $3,500.

Originally Posted by wayner44 View Post
What is the difference between the getting the DHP on the 5 series (includes Adaptive Drive) what is this? and just getting the Dynamic Damper Control as an option.
The Dynamic Damper Control option only gives you Dynamic Damper Control, which is the adjustable suspension.

The Dynamic Handling Package gives you Dynamic Damper Control and Active Drive. Active Drive adds the Active Roll Stabilization feature. The best way to explain Active Roll Stabilization is to first understand what a roll stabilizing bar is.

Most cars, at least sports cars, come with a roll stabilizing bar. This is a torsion bar that connects the left and right wheel so that when you turn sharply and the outside wheel of the turn compresses into the body of the car, rather than allow the car to roll to the outside of the turn, the stabilizing bar will transfer this compression from the outside wheel to the inside wheel. This keeps the car from leaning heavily during the turn.

However, the downside of a roll stabilizing bar is that it makes the general ride of the car stiffer. If you are going straight and go over a bump on one wheel, because there is compression when you go over the bump, the compression is transferred to the other wheel even though you are not turning. This makes for a stiffer and less comfortable ride.

So cars that only have a roll stabilizing bar are tweaked by the manufacturer to give the best balance between avoiding body roll during a turn and still providing a comfortable ride. Some manufacturers are better at this than others, which is why cars differ in their ability to turn and also provide comfort.

With Active Roll Stabilization, rather than the roll stabilizing bar always connecting the two wheels, there is a mechanical unit in the middle that can, in real-time, connect or disconnect the two wheels from roll stabilization. This means that if you are going straight, you get a nice supple ride because the compression of one wheel from a bump does not translate to the other wheel. Then when you hit a corner hard, the mechanical unit in the middle connects the two side of the torsion bar and the car then takes advantage of maximum roll stabilization (transfers a lot of the compression from one wheel to the other) to keep the car from leaning.

With the Active Roll Stabilization feature, you will get better cornering with less roll while still getting a comfortable ride. It's a $2,500 feature, so be sure you really enjoy cornering hard in your BMW or you will not need the feature.

Originally Posted by wayner44 View Post
I do plan to get the M sport package in order to get the paddle shift transmission. Does the 19inch wheels make you feel the road that much more?
More important than 19" vs. 18" are run flat tires vs. non-run flat tires. Changing out the run flats for non-run flats will generally make the ride more comfortable. I have not felt a different between the two in terms of feeling the road through the steering wheel.


Last edited by cordoor; 12-07-2012 at 08:51 AM.
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