Mercedes-Benz Conecto Manual page 232

Practical advice
Snow chains
Danger.
Make sure that the snow chains are fit-
ted tightly. Do not exceed the permitted
maximum speed of 25 mph (40 km/h).
Note:
Check that the snow chains are seated
firmly after driving for a suitable distance
(dependent upon the conditions), retighten
if necessary.
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CONECTO (C628.3--)/08.2007 GB