Tire Inflation Pressure - Mercedes-Benz ML 320 Operator's Manual

5. Plug air pump electrical plug (2) into electrical
outlet in front passenger footwell or rear cargo
compartment.
6. Start the engine and switch on the air pump.
Warning!
When working on the vehicle with the engine
running, always set the parking brake in addition
to shifting the gear selector lever to position "P".
7. Operate air pump (approximately 8 minutes) until
pressure gauge displays 61 psi (4.2 bar).
8. Switch off air pump and turn off the engine.
9. Unscrew filler hose from space-saver tire. Reinstall
tire valve cap.
Warning!
To prevent possible injury when unscrewing air
pump filler hose from space-saver tire valve after
inflating the tire, use a rag since the tire valve
could be hot.
Note:
Excessive tire air pressure should be released using the
vent screw.
Tires, Wheels
Instruments
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204
Instrument
Driving
cluster display

Tire inflation pressure

A table (see fuel filler flap) lists the tire inflation
pressures specified for Mercedes-Benz recommended
tires as well as for the varying operating conditions.
Important!
Tire pressure changes by approximately 1.5 psi (0.1 bar)
per 18°F (10°C) of air temperature change. Keep this in
mind when checking tire pressure inside a garage –
especially in the winter.
Example:
If garage temperature = approximately +68°F (+20°C)
and ambient temperature = approximately +32°F (0°C)
then the adjusted air pressure = specified air pressure
+3 psi (+0.2 bar).
Tire pressures listed for light loads are minimum values
offering high driving comfort. Increased inflation
pressures for heavy loads produce favorable handling
characteristics with lighter loads and are perfectly
permissible. The ride of the vehicle, however, will
become somewhat harder.
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