it causes the steering wheel shaking on my car

 

Actually it is the skipping noise of summer tires when making slow sharp turn. I just replaced with all seasons tires and the skipping, hopping is gone. Thanks everyone.

 

@ScottDy Said it best - it's normal, but annoying. It's the geometry of the wheels, and more than just the Panamera re at fault.

I got rid of my 2003 996 TT because it was a heavy clunking noise from front end and I did not want to spend more into it. Traded it in.... Now that I know it was "normal" it makes me a bit more pissed, but Porsche doesnt really tell you this. After now owning 6 Porsche's I can say, it's normal and to expect it. Especially in reverse with the wheel turned.

 

. Hi Scott, I have a 2012 Boxster Black edition with only 18500Km. I did a three point turn in my wet driveway and also noticed a clunk noise. Tires may need replacement in another year as I don’t drive it much. But your message was very interesting as the noise I experienced sounded like it may have been the tires dragging over the wet pavement during the three point turn. Is this normal?

 

I can’t speak for other Porsche models although I had an early boxster and never experienced this issue. I know it’s normal on Panameras and I think that’s because of the cars size and the way the front end geometry is set up to allow it the kind of handling it has, for such a large and heavy car it is really quite nimble and that’s because the suspension is tweaked to perform at speed.

 

This type of sound is common across top sports car marquees. I had this exact same scenario you described in my Huracan. GTRs, Alfas, Vettes, and others all have reports of this same phenomenon. It’s called the Ackermann Angle (or Effect)

I pulled this from a Lambo forum post.
“The noise being heard is the result of the intentional negative camber applied to the front wheels. The purpose is to provide greater grip in high speed cornering. At slow speeds when the front wheels are turned fully, the tires are not making full contact with the road surface resulting in tire noise accompanied with a sputtering sensation.” credit to user Coincident

Here is another great summary on Porsche and Corvettes encountering wheel hop and the Ackermann effect.
Wheel hop in Porsche explained

 

I suspect your noise at slow speeds and sharp turns, is the result of your car being AWD and differential causing one tire having to travel further than another in a sharp turn. AWD card make this sound.