stefanc67

Hi, I have a Mercedes S212 station AMG E350 4Matic 2016 year model. On the car today I have the 245/40/18 rims 8.5x18 ET45. the car is an S212 station wagon i need help with is, i just bought forge AMG 20x8.5 ET45 rims, all 4 rims have the same dimensions now i need recommendations what tires i'm going to use,as i noy want to damage the 4-wheel drive in the long run also be able to keep load index as close as possible, if possible as original and stay within the 5% diffrence in roller circumference
Original 245/40/18. Loadindex 97
option 1
245/30/20. Loadindex 90 roller circumference 0.3%

option 2
245/35/20 loadindex 95,roller circumference. 4.0%

option 3
255/35/20 loadindex. 97 roller circumference. 5.1%

option 4 can i go for staggered setup with same width on all 4 rims if yes demensions on them?
please if you have the knowledge please help out as im totslly lost in this mess most important not to damage the 4 wheel drive and im not slaming down the suspendion on the car
stefan