Mercedes-Benz SLK-Class 2008 Owner's Manual page 254

Performance Package
Front axle Summer tyres
Light-alloy wheels
Summer tyres
Rear axle 40
Light-alloy wheels
Both axles Winter tyres
Light-alloy wheels
40 Use of snow chains not permitted.
SLK 55 AMG
225/40 ZR18 92Y XL
7.5J x 18 H2 ET 37
245/35 ZR18 92Y XL
8.5J x 18 H2 ET 30
225/40 R18 92H XL M+S
7.5J x 18 H2 ET 37
Technical data
Tyres and wheels
251