If it happens at a stand still, that's weird. When driving the vibration might be from the wheels. Do they have the correct hub-centric rings installed?

 

Probably out of balance...assuming the rims/tires are good
Sounds like your car is running out of juice or something not matching up with the new rim size...can't tell from your post, more details!

 

i think you need to post pix

 

haha it happened when the car is at a stand still. I took the car out and drove it around. The problem slowly faded away. I have not checked it today but will do it soon.

 

When you turn the wheels left and right at a stand still, the quivering is the EPS re-calibrating. When you start driving, the quivering will stop unless you have other issues with the S.

But I like Chow-bots answer better.

 

It's the EPS doing its thing, don't worry about it.

Now show us some pics!

 

pix of it never happend

 

hmmm.. EPS re-calibration...

so everybody can do this?

 

I know my car does this when I saw on the steering wheel with the car stopped.

 

What rims did you get ???