Need help for S class wheels and tires

[Woofer2021]

Hello,
My drive is mercedes S350 4matic long from 2010.
I have some questions:
1) i post here what tires will go on my merc (i take a picture from my reservoar cap) and i need to know for example for 18inch wheels DO I NEED to go with front tires 255 /45/18 and rear tires 275/45/18 or all four tires must be THE SAME (255 or 275). On my fuel cap i dont have written marks what is for front or rear dimensions?? Or does that means that all four tires must be the same because is 4matic
2) i found amg 20inch wheels and tires that are front 8.5j and rear 9.5j and dimensions of tires is front 255 35 20 and rear 275 35 20 but seller say that this wheels will fit on all s class except 4matic s class??

 

[tode]

Hello and welcome;

You don't say what wheels you have on the car at the moment . . .

In my opinion, you would do better to stay with 255/45R18 all round (which is probably the original fitting) - it allows you to permutate the wheels to even out wear and will give you a more comfortable ride than 20s.