Mercedes-Benz S-Class Coupe Operator's Manual page 346

Wheel and tire combinations
344
G
WARNING
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip
over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
Always pay attention to the instructions and
safety notes in the "Changing a wheel" section
( page 340).
Y
Only use wheel bolts that have been designed
for the wheel and the vehicle. For safety rea-
sons, Mercedes-Benz recommends that you
only use wheel bolts which have been approved
for Mercedes-Benz vehicles and the respective
wheel.
!
Mercedes-AMG vehicles: during removal
and repositioning of the wheel, the wheel rim
can strike the ceramic-brake disc and dam-
age it. Therefore, you should proceed care-
fully and get a second person assist to you.
Alternatively, you can use a second alignment
bolt.
!
To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
Clean the wheel and wheel hub contact sur-
X
faces.
Slide the wheel to be mounted onto the align-
X
ment bolt and push it on.
Tighten the wheel bolts until they are finger-
X
tight.
Unscrew the alignment bolt.
X
Tighten the last wheel bolt until it is finger-
X
tight.
Lowering the vehicle
G
WARNING
The wheels could work loose if the wheel nuts
and bolts are not tightened to the specified
tightening torque. There is a risk of accident.
Have the tightening torque immediately
checked at a qualified specialist workshop
after a wheel is changed.
Place the ratchet wrench onto the hexagon
X
nut of the jack so that the letters AB are visi-
ble.
Turn the ratchet wrench until the vehicle is
X
once again standing firmly on the ground.
Place the jack to one side.
X
Tighten the wheel bolts evenly in a crosswise
X
pattern in the sequence indicated (: to A).
The tightening torque must be 110 lb-ft
(150 Nm).
Turn the jack back to its initial position.
X
Stow the jack and the rest of the vehicle tools
X
in the trunk again.
Check the tire pressure of the newly mounted
X
wheel and adjust it if necessary.
Observe the recommended tire pressure
( page 324).
Y
i
Vehicles with a tire pressure control system:
all mounted wheels must be equipped with
functioning tire pressure control sensors.
Wheel and tire combinations
General notes
!
For safety reasons, Mercedes-Benz recom-
mends that you only use tires and wheels