Mercedes-Benz A-Class Operator's Manual page 411

The vehicle is not on a slope.
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The vehicle is on solid, non-slippery and level
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ground.
Apply the electric parking brake manually.
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Move the front wheels to the straight-ahead
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position.
Vehicles with automatic transmission:
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Shift into position j.
Switch off the engine.
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Make sure that the engine cannot be started.
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Place chocks or other suitable items under
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the front and rear of the wheel that is diago‐
nally opposite the wheel you wish to change.
Remove the hub caps if necessary
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( page 409).
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Raise the vehicle ( page 409).
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Removing and installing hub caps
Requirements:
The vehicle is prepared for a wheel change
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( page 408).
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Vehicles with steel wheels
The wheel trim covers the wheel bolts. Before
you can unscrew the wheel bolts, you must
remove the wheel trim.
To remove: using both hands, carefully reach
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into two wheel trim openings and remove the
wheel trim.
Plastic hub cap
To remove: turn the center cover of the hub
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cap counter-clockwise and remove the hub
cap.
To install: make sure that the center cover of
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the hub cap is turned counter-clockwise.
Wheels and tires 409
Position the hub cap and turn the center
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cover clockwise until the hub cap engages
physically and audibly.
Raising the vehicle when changing a wheel
Requirements:
There are no persons in the vehicle.
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The vehicle has been prepared for a wheel
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change ( page 408).
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The hub caps have been removed
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( page 409).
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Important notes on using the jack:
Only use the vehicle-specific jack that has
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been tested and approved by Mercedes-Benz
to raise the vehicle.
The jack is only designed for raising and
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holding the vehicle for a short time while a
wheel is being changed and not for mainte‐
nance work under the vehicle.
The jack must be placed on a firm, flat and
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non-slip surface. If necessary, use a large,
flat, load-bearing, non-slip underlay.