Mercedes-Benz 350 SDL Owner's Manual page 80

Tire Inflation Pressure
A table (see fuel filler flap) lists the tire
inflation pressures specified for
summer and winter tires as well as for
the varying operating conditions.
Important!
Tire pressure differs by approx.
0.1 bar (1.5 psi) per 10°C (18°F) of air
temperature change. Keep this in
mind when checking tire pressure
inside a garage - especially in the
winter.
Example:
If garage temperature =
approx. +20°C (+68°F) and,
ambient temperature =
approx. 0°C (+32°F) then the adjusted
air pressure = specified air pressure
+0.2 bar (+3 psi).
78
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.
Tire temperature and pressure
increase with the vehicle speed. Tire
pressure should therefore only be
corrected on cold tires. Correct tire
pressure in warm tires only if pressure
has dropped below the pressure listed
in the table and the respective
operating conditions are taken into
consideration.
An underinflated tire due to a slow
leak (e.g. due to a nail in the tire) may
cause damage such as tread separa­
tion, bulging, etc. Regular tire pres­
sure checks (including the spare tire)
at intervals of no more than 14 days
are therefore essential.
If a tire constantly loses air, it should
be inspected for damage.
Warning!
Do not overinflate tires. Overin­
flating tires can result in sudden
deflation (blow-out) because they
are more likely to become
punctured or damaged by road
debris, potholes, etc. Follow
recommended inflation pres­
sures.
Do not overload the tires by ex­
ceeding the specified vehicle
capacity weight (as indicated by
the label on the driver's door
latch post). Overloading the tires
can overheat them, possibly
causing a blow-out.