Mercedes-Benz 2009 CLK-Class Operator's Manual page 368

Technical data
Rims and tires
Same size tires
Model CLK 350
Rims (light 7.5 J x 17 H2
alloy)
Wheel offset 1.42 in (36 mm)
27,28 225/45 R17 91H M+S.
Winter tires
or
225/45 R17 91H M+S.
MOExtended
26 Canada only.
27 Radial-ply tires.
28 Not available as factory equipment.
29 Must be used in conjunction with Tire Pressure Monitoring System (U.S. vehicles) or Run Flat Indicator (Canada vehicles) only.
30 For use with snow chains contact an authorized Mercedes-Benz Center.
31 Permissible vehicle speed of max. 143 mph (230 km/h).
366
CLK 550
7.5 J x 17 H2
1.42 in (36 mm)
225/45 R17 91H M+S.
or
225/45 R17 91H M+S.
29
MOExtended
CLK 63 AMG
8 J x 18 H2
1.34 in (34 mm)
225/40 R18 92V XL (Extra Load) M+S.
29
26
30,31