Mercedes-Benz 2016 S-Class Operator's Manual page 426

Wheel and tire combinations
424
Tires
FA: 255/40 R20 101 V XL M+S i
RA: 285/35 R20 104 V XL M+S i
FA: 255/40 R20 101 V XL M+S i
RA: 285/35 R20 104 V XL M+S i
Use of snow chains not permitted. Observe the notes in the "Snow chains" section.
2
Wheels
FA: 8.5 J x 20 H2
Wheel offset: 1.50 in (38 mm)
2
RA: 9.5 J x 20 H2
Wheel offset: 1.50 in (38 mm)
FA: 8.5 J x 20 H2
Wheel offset: 1.54 in (39 mm)
2
RA: 9.5 J x 20 H2
Wheel offset: 1.54 in (39 mm)