Mercedes-Benz CLA Owner's Manual page 506

Fitting a new wheel
Requirements:
The wheel is removed (
/
R
Mercedes-AMG vehicles: observe the notes in
the Supplement. Otherwise, you may fail to rec‐
ognise 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.
#
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‐
#
aged hub threads replaced.
Do not continue driving.
#
Observe the information on the choice of
#
tyres (
page 502).
For tyres with a specified direction of rotation,
an arrow on the side wall of the tyre indicates
the correct direction of rotation. Observe the
direction of rotation when fitting.
& 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
#
when the vehicle is on the ground.
Be sure to observe the instructions and
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safety notes on "Changing a wheel"
( page 495).
/
For safety reasons, only use wheel bolts
#
which have been approved by Mercedes-
Benz and for the wheel in question.
Tighten the wheel bolts evenly in a diagonal
#
pattern in the order indicated until they are
finger-tight.
page 495).
/
Wheels and tyres 503
If the collapsible emergency spare wheel has
#
been fitted, inflate the collapsible emergency
spare wheel ( page 508).
/
Lower the vehicle ( page 503).
/
#
Lowering the vehicle after a wheel change
Requirements:
The new wheel has been fitted
R
( page 503).
/
* NOTE Damage to the emergency spare
wheel when lowering the vehicle
Lowering the vehicle without previously
inflating the emergency collapsible spare
wheel can damage its rim.
Inflate the emergency collapsible spare
#
wheel using the tyre inflation compres‐
sor before lowering the vehicle.
Place the ratchet onto the hexagon nut of the
#
jack so that the letters "AB" are visible.
To lower the vehicle: turn the ratchet of the
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jack anti-clockwise.