Mercedes-Benz 2003 M-Class Operator's Manual page 260

Practical hints
Flat tire
Warning!
Follow recommended inflation pressures.
Do not overinflate tires. Overinflated tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
Do not overload the tires by exceeding the
specified vehicle capacity weight (as indicat-
ed by the label on the driver's door latch
post). Overloading the tires can overheat
them, possibly causing a blowout.
260
Detach the electric air pump.
G
Reinstall tire valve cap.
Store the electrical plug and the air
hose behind the flap and place the air
pump back in the rear cargo compart-
ment.