Mercedes-Benz A-Class 2021 Operator's Manual page 317

Remove the wheel and, if necessary, store it
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in the trunk.
Notes on removing an emergency spare
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wheel ( page 317).
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Installing a new wheel
Requirements:
The wheel is removed ( page 314).
R /
* NOTE Mercedes-AMG vehicles
Observe the notes in the Supplement.
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You could otherwise fail to recognize
dangers.
& WARNING Risk of accident from losing a
wheel
Oiled, greased or damaged wheel bolt/wheel
nut threads or wheel hub/wheel mounting
bolt threads can cause the wheel bolts/
wheel nuts to come loose.
As a result, you could lose a wheel while driv‐
ing.
Never oil or grease the threads.
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In the event of damage to the threads,
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contact a qualified specialist workshop
immediately.
Have the damaged wheel bolts or dam‐
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aged hub threads replaced.
Do not continue driving.
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Observe the information on the choice of
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tires ( page 307).
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For tires with a specified direction of rotation, an
arrow on the side wall of the tire indicates the
correct direction of rotation. Observe the direc‐
tion of rotation when installing.
Slide the wheel to be mounted onto the
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alignment bolt and push it on.
Observe the notes on installing an emer‐
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gency spare wheel ( page 317).
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Wheels and tires 315
& WARNING Risk of injury from tightening
wheel bolts and nuts
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip.
Only tighten wheel bolts or wheel nuts
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when the vehicle is on the ground.
Observe the instructions and safety notes on
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"Changing a wheel" ( page 307).
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For safety reasons, only use wheel bolts
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which have been approved by Mercedes-
Benz and for the wheel in question.
* NOTE Damage to paintwork of the wheel
rim when screwing on the first wheel bolt
If the wheel has too much play when screw‐
ing in the first wheel bolt, the wheel rim paint
can be damaged.
Press the wheel firmly against the
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wheel hub when screwing on the first
wheel bolt.