Mercedes-Benz 2008 CLS 550 Operator's Manual page 443

Technical data
Rims and tires
Model
Front axle:
Rims (light alloy)
Wheel offset
1
Summer tires
Winter tires
Rear axle:
Rims (light alloy)
Wheel offset
1,2
Summer tires
Winter tires
1
Radial-ply tires
2
Must not be used with snow chains.
442
CLS 63 AMG
8.5 J x 18 H2
0.98 in (25 mm)
255/40 ZR18 99Y XL (Extra Load)
–
9.5 J x 18 H2
1.10 in (28 mm)
285/35 ZR18 101Y XL (Extra Load)
–
CLS 63 AMG*
8.5 J x 19 H2
0.98 in (25 mm)
255/35 ZR19 96Y XL (Extra Load)
–
9.5 J x 19 H2
1.10 in (28 mm)
285/30 ZR19 98Y XL (Extra Load)
–