Mercedes-Benz SL 2008 Owner's Manual page 297

Technical data
Tyres and wheels
18" Both Winter tyres
axles
Winter tyres
Light-alloy
wheels
19" Both Winter tyres
axles
Light-alloy
wheels
Tyres with run-flat characteristics and only in combination with the tyre pressure loss warning or tyre pressure monitor* activated.
30
31 Winter tyres for retrofitting. Only certain tyre brands are approved. Ask your Mercedes-Benz Service Centre for more information.
294
SL 600
255/40 R18 95V M+S
30, 31 255/40 R18 95V M+S MOExtended
8.5J x 18 H2 ET 35
–
–
SL 63 AMG SL 65 AMG
255/40 R18 95V M+S –
– –
8.5J x 18 H2 ET 30 –
255/35 R19 96V XL M+S 255/35 R19 96V XL M+S
8.5J x 19 H2 ET 30 8.5J x 19 H2 ET 30
* optional