Whe el s and tire s, Tire pressure – Mercedes-Benz CLA-Class 2015 User Manual

Page 325

Example: tire pressure table with tire dimensions

If a tire size precedes a tire pressure, the tire

pressure information following is only valid

for that tire size. The load conditions "partially

laden" and "fully laden" are defined in the

table for different numbers of occupants and

amounts of luggage. The actual number of

seats may differ.

Some tire pressure tables show only the rim

diameters instead of the full tire size, e.g.

R18. Rim diameter is part of the tire size and

can be found on the tire sidewall

(

page 335).

If the tire pressures have been set to the

lower values for lighter loads and/or lower

road speeds, the pressures should be reset to

the higher values:

if you want to drive with an increased load

and/or

if you want to drive at higher road speeds

The tire pressures for increased loads

and/or higher road speeds, shown in the

tire pressure table, may have a negative

effect on driving comfort.

If the tire pressure is not set correctly, this

can lead to an excessive build up of heat and

a sudden loss of pressure.
For more information, contact a qualified spe-

cialist workshop.

Important notes on tire pressure

WARNING

If the tire pressure drops repeatedly, the

wheel, valve or tire may be damaged. Tire

pressure that is too low may result in a tire

blow-out. There is a risk of an accident.

Check the tire for foreign objects.

Check whether the wheel is losing air or the

valve is leaking.

If you are unable to rectify the damage, con-

tact a qualified specialist workshop.

WARNING

If you fit unsuitable accessories onto tire

valves, the tire valves may be overloaded and

malfunction, which can cause tire pressure

loss. Due to their design, retrofitted tire pres-

sure monitors keep the tire valve open. This

can also result in tire pressure loss. There is a

risk of an accident.
Only screw the standard valve cap or other

valve caps approved by Mercedes-Benz for

your vehicle onto the tire valve.

Use a suitable pressure gauge to check the

tire pressure. The outer appearance of a tire

does not permit any reliable conclusion about

the tire pressure. On vehicles equipped with

the electronic tire pressure monitor, the tire

pressure can be checked in the on-board

computer.
The tire temperature and pressure increase

when the vehicle is in motion. This is depend-

ent on the driving speed and the load.
Therefore, you should only correct tire pres-

sures when the tires are cold.

Tire pressure

323

Whe

and

tire