2018 MERCEDES-BENZ S-CLASS CABRIOLET wheel bolts

Notes on care of vehicle parts
&
WARNING Risk of entrapment if the
windshield wipers are switch ed on while
th e windshield is being cleaned
If th e windshield wipers are set in motion
while you are cleaning the windshield or
wiper blades, you can betrapped bythe
wiper arm.
#Alw ays switch off the windshield wipers
and the ignition before cleaning the
windshield or wiper blades.
& WARNING Risk of burn s fromtailpipes
and tailpipe trim
The tailpipe and tailpipe trim can become
ve ry hot. If you come into contact withth ese
parts of theve hicle, you could burn yourself.
#Alw ays be particular lycareful around
th eta ilpipe and theta ilpipe trim.
#Allow theve hicle parts tocool down
before youto uch them.
Obser vethefo llowing information:
Information on cleaning and car eAvoiding vehicle damage
Wheels/rims Usewate r and acid-free wheel cleaners.
RDo not use acidic wheel cleaners toremo vebrake dust.
This could damage wheel bolts and brake components.
RTo avoid cor rosion of the brake discs and brake pads,
drive theve hicle for a few minutes af ter cleaning before
parking it. The brake discs and brake pads warm up and
dry out.
Wi ndo ws
Cleanthe windo wsonthe inside and outside using a damp
clo thand cleaning agents recommended byMercedes-Benz. Do not use dry clo
ths or abrasive or sol vent-based cleaning
agents toclean the inside of windo ws.
338
Maintenance and care

#Usingthe lug wrench, loosen the wheel bolts
on the wheel youwish tochange byabout
one full turn. Do not unscr ewthe bolts com‐
ple tely.Po sition of jack support points
&
WARNING Risk of injury from incorrect
positioning of the jack
If yo u do not position the jack cor rectly at
th e appropriate jacking point of theve hicle,
th e jack could tip with theve hicle raised.
#Only position the jack at the appropri‐
ate jacking point of theve hicle. The
base of the jack must be positioned ver‐
tically under the jacking point of the
ve hicle.
* NO
TEVehicle damage from the jack
Ifyo udo not position the jack cor rectly at
th e appropriate jack support point of the
ve hicle, the jack could tip over with theve hi‐
cle raised.
#The jack is designed exclusively for
jacking up theve hicle at the jack sup‐
port points.
#Ta ke thera tchet wrench out of the tire-
ch ange tool kit and place it on the he xagon
nut of the jack so that the lettering "AUF" is
visible.
388 Wheels and tires

#Position jack 2at jack support point 1.
#Turn ratchet wrench 3clockwise until jack
2 sits comple tely on jack support point 1
and the base of the jack lies evenly on the
ground .
#Continue toturn ratchet wrench 3until the
tire is raised a maximum of 1.2 in (3 cm) off
th e ground.
#Loosen and remo vethe wheel (→page 389).
Re moving a wheel
Requirement:RThe vehicle is raised (→page 387).
When changing a wheel, avoid applying any forc e
to the brake discs, since this could impair the
le ve l of com fort when braking.
* NO
TEDama getothre ading from dirt on
wheel bolts
#Do not place wheel bolts in sand or on
a dirty sur face.
#Un scr ew the uppermost wheel bolt com‐
ple tely.
#Scr ew centering pin 1instead of the wheel
bolt into theth re ading.
#Un scr ew there maining wheel bolts fully.
#Re mo vethe wheel.
#Ins tallth e new wheel (→page 389).
Installing a new wheel
Re quirement:RThe wheel is remo ved (→page 389).
Wheels and tires 389

&WARNING Risk of accident from losing a
wheel
Oiled, greased or damaged wheel bolt/wheel
nut thre ads or wheel hub/wheel mounting
bolt thre ads can cause the wheel bolts/
wheel nuts tocome loose.
As a result, you could lose a wheel while driv‐
ing.
#Ne ver oil or grease theth re ads.
#In theeve nt of damage totheth re ads,
con tact a qualified specialist workshop
immediatel y.
#Have the damaged wheel bolts or dam‐
aged hub thre ads replaced.
#Do not continue driving.
#Obser vethe information on thech oice of
tires (→page 382).
Fo r tires with a specified direction of rotation, an
ar row onthe side wall of the tire indicates the
cor rect dire ction of rotation. Observ eth e direc‐
tion of rotation when ins talling.
#Slide the wheel tobe mounted onto the cen‐
te ring pin and push it on.
&
WARNING Risk of injury from tightening
wheel bolts and nuts
If yo u tighten the wheel bolts or wheel nuts
when theve hicle is raised, the jack could tip.
#Only tighten wheel bolts or wheel nuts
when theve hicle is on the ground.
#Fo r saf etyre asons, only use wheel bolts
whic h havebeen appr ovedby Mercedes-
Benz and forth e wheel in question.
* NO
TEDama getopaintwork of the wheel
ri m when scr ewing on thefirs t wheel bolt
If th e wheel has too much play when scr ew‐
ing in thefirs t wheel bolt, the wheel rim paint
can be dama ged.
#Press the wheel firm lyagainst the
wheel hub when scr ewing on thefirs t
wheel bolt.
#Ti ghten the wheel bolts until they are finger-
tight.
#Un scr ew the centering pin.
#Tighten the last wheel bolt until it is finger-
tight.
#Lo we rth eve hicle (→page 390).
Lo weri ngtheve hicle af ter a wheel change
Re quirements:RThe new wheel has been ins talled
(→page 389).
#Place thera tchet wrench onto the he xagon
nut of the jack so that the lettering "AB" is
visible.
#To lowe r the vehicle: turnthera tchet
wrench of the jack counter-clockwise.
390
Wheels and tires

#Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated (1 to5).
Specified tightening torq ue: 111 lb-ft
(150 Nm).
& WARNING Risk of injury thro ugh incor‐
re ct tigh tening torque
Th ewheels could come loose if the wheel
bolts or wheel nuts are not tightened tothe
prescribed tightening torque.
#Ha ve the tightening torque checked
immediately at a qualified specialist
wo rkshop af terch anging a wheel.
#Check the tire pressure of the newly moun‐
te d wheel and adjust according ly.
#Ve hicles with a tire pressure monitoring
sy stem: Restart the tire pressure monitoring
sy stem (
→page 369).
Make sure toobser vethefo llowing fur ther rela‐
te d subjec t:
RNotes on tire pressure (→page 364)
Wheels and tires 391