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244 Wheels and tyres
Lowering the vehicle after a wheel change
& WARNING Risk of accident due to incor-
rect tightening torque
The wheels could come loose if the wheel bolts
or wheel nuts are not tightened to the prescri-
bed torque.
Ensure that the wheel bolts or wheel nuts
#
are tightened to the prescribed tighten-
ing torque.
If you are not sure, do not move the vehi-
#
cle. Contact a qualified specialist work-
shop and have the tightening torque
checked immediately.
Requirements:
The new wheel has been fitted (
R
Place the adapter and the ratchet on the hexa-
#
gon head nut of the jack such that the lettering
AB/DOWN is visible.
To lower the vehicle: turn the ratchet of the
#
jack anti-clockwise.
Tighten the wheel bolts evenly in a crosswise
#
pattern in the sequence indicated
and to a maximum of 180 Nm.
Check the tyre pressure of the newly fitted
#
wheel and adjust it if necessary.
Vehicles with the tyre pressure monitor system: all
fitted wheels must be equipped with functioning
sensors.
Retighten the wheel bolts to the specified tight-
#
ening torque after the vehicle has been driven
50 km.
%
When using a wheel or spare wheel with a new
or newly painted disk wheel, have the wheel
bolts retightened again after approximately
1,000 to 5,000 km. Observe the specified
tightening torque.
Information on wheel and tyre combinations
General notes
Information on tyres, wheels and permissible com-
binations can be obtained at a qualified specialist
workshop.
The smaller the cross-section of a tyre of a specific
wheel size, the worse the driving comfort on poor
road surfaces. Ride and damping comfort are
reduced and the risk increases that when you drive
over obstacles, damage to wheels and tyres may
result.
If you change wheel size on your vehicle, check it
is assigned to the correct wheel size category
(
/
recoding the control units in the vehicle, the
speedometer will not display the speed accurately.
page 243).
/
Driving safety systems and driving systems may
then be operationally impaired or may detect a
malfunction and switch themselves off.
You will find a table with the recommended tyre
pressures for various vehicle loads inside the flap
on the left B-pillar or under "Tyre pressure tables"
(
/
Check tyre pressures regularly and only when the
tyres are cold.
Observe the following notes:
R
R
You can obtain information about tyres that have
to 5)
(1
been specially designed and approved for your
vehicle from a Mercedes-Benz Service Centre.
%
T447 0414 02
page 241). If the assignment changes without
page 237).
always fit the vehicle with tyres of the same
size on a given axle (left/right)
always fit the same type of wheels on your
vehicle at a given time (summer tyres, winter
tyres)
Not all wheel/tyre combinations can be fitted
at the factory in all countries.
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