See also:

PSI (pounds per square inch)
A standard unit of measure for tire pressure. ...

Maximum load rating
The maximum load rating in kilograms or pounds is the maximum weight for which a tire is approved. ...

Stowing a used collapsible spare wheel
Take the following steps to stow a used collapsible spare wheel. It will otherwise not fit in the spare wheel well. Mercedes-Benz recommends that you have this work carried out at a qualified spec ...