Mercedes-Benz 2006 CLS 500 Operator's Manual page 339

Operation
Winter driving
!
Some tire sizes do not leave adequate
clearance for snow chains. To help
avoid serious damage to your vehicle or
tires, use of snow chains is not permis-
sible with the following tire sizes:
275/30 R19 96V XL
(Extra Load) M+S.
275/35 R18 95V
285/35 ZR18 101Y XL (Extra Load)
285/30 ZR19 98Y XL (Extra Load)
T 155/70 R17 110M
175/55-18 95P
338