Al, if anyone knows about crosswinds it should be you!
I would think the solution would be to drive much faster. That way your relative wind becomes more of a headwind and the awesome aerodynamics of the S take over. This, I think, is a good solution to many of the problems on these forums. Just drive faster!
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If the tire pressures are not correct (in particular if they don't have the same balance front to rear as on the vehicle placard--and assuming no mistakes in the placard recommendation) a crosswind will push one axle more than the other causing the car to turn. Because wind is seldom steady, this causes the car to wander. So if your having a problem, first check the tire pressures. Second try one finger steering. If there is still a problem check the alignment--in particular unequal camber from side to side can cause this. If both these are okay, experiment with a bit more pressure in the rear than in the front.
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I take "Electro", my amazing Model S, to the train station: yes, it's a station wagon
I think you're probably on to it. My S and my last car, a Mini, both have electric steering. The Mini is not a big car, and had an excellent chassis with great feedback and sharp responses. But it, like the S, always seemed a little bit more affected by freeway crosswind than other cars I've owned. It may be because there's a little bit of a dead zone in the center of the steering in electric steerers.
Good news. I finally have my car. Yesterday, the first day I drove it to work, we had high winds for most of the day. My route to work takes me through many areas (back roads, then highway). I put the car in standard mode and drove through the crazy winds crossing the highway at various speeds. The car was rock solid for the most part. I was greatly concerned about this aspect, but no longer fear it after the drive.
The only real movements I felt from the wind were when I was at a stop light. I could feel a little movement in the higher part of the cabin. Outside of that, nothing really.
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