the car vibrates when I take a U-turn.
Does anyone know how to fix it?

 

How are your wheel bearings?

 

Bentleytech would know, though it may be that she needs new uppers on the front suspension. If they've never been changed, I'd bet they may need to be. Common problem due to the car's immense weight. Have the dealer/independent check your suspension bushings/bits.

 

Thank you, I will change the upper arm bushes?
Thank you