See also:

Snow chains
For safety reasons, Mercedes-Benz recommends that you only use snow chains which have been specially approved for your vehicle by Mercedes-Benz, or are of a corresponding standard of quality. ...

Bead
The tire bead ensures that the tire sits securely on the wheel. There are several steel wires in the bead to prevent the tire from coming loose from the wheel rim. ...

2011 Mercedes-Benz R-Class Review by Kristin Varela
What's a parent to do when they need to transport more than two or three children (or adults for that matter), but they're not willing to make the leap to a minivan and don't love the trucky feel ...