Mercedes-Benz A-Class 2021 Operator's Manual page 293

Some tire pressure tables only show the rim
diameter instead of the complete tire size, e.g.
R18. The rim diameter is part of the tire size and
can be found on the tire side wall (
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Tire and Loading Information placard
R
( page 295)
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Maximum tire pressure ( page 301)
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R
Checking tire pressures manually
Read the tire pressure for the current operat‐
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ing conditions from the Tire and Loading
Information placard or the tire pressure
table. Observe the notes on tire pressure.
Remove the valve cap of the tire to be
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checked.
Press the tire pressure gauge securely onto
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the valve.
Read the tire pressure.
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If the tire pressure is lower than the recom‐
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mended value, increase the tire pressure to
the recommended value.
If the tire pressure is higher than the recom‐
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mended value, release air. To do so, press
down the metal pin in the valve, e.g. using
the tip of a pen, for example. Then check the
tire pressure again using the tire pressure
page 302).
gauge.
Screw the valve cap onto the valve.
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Further related subjects:
Notes on tire pressure (
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Tire pressure table (
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Tire and Loading Information placard
R
( page 295)
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Tire pressure monitoring system
Function of the tire pressure monitoring sys‐
tem
& DANGER Risk of accident due to incor‐
rect tire pressure
Each tire, including the spare (if provided),
should be checked monthly when cold and
then inflated to the inflation pressure recom‐
mended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure
label. (If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or tire inflation pressure label, you
should determine the proper tire inflation
pressure for these tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitor‐
page 288)
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ing system (TPMS) that illuminates a low tire
Wheels and tires 291
page 290)
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