There is vibration on the steering as well as the passenger seat is shaking . on 2001 Mercedes-Benz S430

S430 Year 2001 Vibration
There is vibration on the steering as well as the passenger seat is shaking and underneath my foot “felt like “when I drive above 60KM till 130 KM. I have this problem for long time about 6 month:
I have changed the following parts:
- Break shoe 4 Wheels
- Break disk 4 wheels
- All new tires 4 Wheels
- Front / Left hand side bearing
- I have did wheels alignment

I have checked the following and the mechanic confirmed there are ok:-
- Propeller shaft it’s ok no defect or sound of crank on it .
- no sound or noise on the drive shaft and the oil level is ok
- Checked the Ball Joint and all the sides are in good condition and ok .
- The boot inspected are ok
- Control Arm both side are ok

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1 answer
poss tire has a small bubble or you could have lost balance weights