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How do I know my rear wheel steering is working?

USMA81

Macan 4
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The tighter turning radius at low speeds is the RAS attribute that will have the most meaning in daily use. Yet IMO if someone orders a Turbo or S, they should get the RAS option, as it improves driving performance at high speeds. That is the reason they bought a Turbo or S, or any Porsche, right, driving performance?

I have RAS on my 4 to improve driving performance on twisty roads. Ironically it may have played a role in saving my life on a straight highway. I had Innodrive engaged (I’m very comfortable with Innodrive, too comfortable it turns out). I was looking down at the map screen and didn’t notice the highway was going from three lanes to two. A slow semi was merging from the right lane into my center lane, and Innodrive had not recognized this. Fortunately I looked up in time to see that I was seconds from impacting the rear corner of the merging truck. I jerked the wheel hard left into the other lane, then hard right to keep from going off the road. I passed safely down the left side of the truck. The maneuver was hard enough that I thought, “Wow, glad I didn’t roll it.” RAS, and other aspects of the vehicle like the low center of gravity, likely played a part in this safe outcome.

I used to pilot a small plane on business trips in challenging weather. One had to know if there “dark corners” near the edges of performance in the airplane or its systems that could bite you if you got too close. What is true for flying is also true for the Macan. I’m still learning where those dark corners are, like Innodrive not dealing effectively with a vehicle in front and slightly off center to my direction of travel. Maybe Innodrive would have caught it, and slowed before impact, but I’m not sure. Still, I can’t blame this on anything other than my own lack of attention and over-reliance on Innodrive. Glad I had RAS if indeed it made a difference here.
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krissrock

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yeah, it's often overlooked, but the rear steering also works at speed for increased stability...it's not just for U-turns or tight spaces...
 

wmras

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yeah, it's often overlooked, but the rear steering also works at speed for increased stability...it's not just for U-turns or tight spaces...
Agree. It works in the reverse direction (same direction as front wheels) at high speeds and is the mathematic equivalent of a longer wheelbase (more stability).
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