2004 MERCEDES-BENZ CLK CABRIOLET Owners Manual

246 Operation
Engine compartmentToppi
ngup the engine oil
Th e illustration shows an 8-cylinder engine
1 Filler neck
6 Unscrew the cap on filler neck 1.
Make sure that you do not add too
much oil.
! You must have any exces soil drained or si-
pho ned off at a Mercedes-Benz Service Centre,
for example. The engine or the catal ytic co nvert-
er co uld oth erwi se be dam aged. 6
Screw the cap back onto the filler neck. Other messages in the display
If the engine is at normal operating tem-
perature and there is too much oil, you will
see the following message:En
gine oil le vel Reduce oil level!
6Siphon off any excess engine oil.
If too much oil is added, ther eis a risk
of damage to the engine or the catalyt-
ic converter. If the key is not in position
2in the ignition
lock, you will see the following message:
Turn on ignition to see engine oil
level!
6 Switch on the ignition.
If you see the following message:
Observe waiting time:
!You may repeat the measurement in
five minutes when the eng ine is at
normal operating temperature.
! You may repeat the measurement in
30 minutes when the engine isno long-
er at normal operating temperature.
If you see the following message:
Engine oillevel No twhen engi neon!
6Switch off the engine and wait for
five minutes before measuring when
the engine is at normal operating tem-
per atur e.
You will find further information about
engine oil inthe "Technical data" section
( = page 414).
i Press thek orj button on th e multi-
functio nsteeri ng wheel if you wish to clear the
message.
P
18.00-2066-31 H
Environmental note Wh
entopping up th eoil, take care not to
spill any. Oil must not be allowed to escape
into the soil or wate rways. You would other-
wise be damaging the environment. 209en_d2.boo Seite
246 Dienstag, 25. Mai 2004 7:26 19

247
Operation
Engine compartment
There is no need for you to check the oil
level in the autom atictransmission. In the
event of oil loss or problems with gear
shifts, have the automatic tr ansmiss ion
checked at a qualified specialist workshop,
e.g. at a Mercedes-Benz Service Centre.
Coolant is a mixture of water, antifreeze
and corrosion inhibitor. Only check the
coolant level when the vehicle is standing
on a level surface and the engine has
cooled down.
The expansion tank is located in the engine
compartment on the right-hand side when
vi ewed inthe direction of travel. 1
Expans ion tank
6 Slowly unscrew the cap by about one
half turn and allow exc esspr essure to
escape.
6 Then continue to unscrew the cap and
rem ove it.
6 The coolant level is correct if:
! when the coolant is cold, it reaches
the mark inthe expansion tank filler
neck
! when the coolant is hot, it reaches
approximately 1.5 cm higher 6
Top up the coolant in the filler neck if
necessary.
6 Rep lace th e cap by tur ningitt o the
stop.
You will find further informat ion about
coolant inthe "Technical data" section
( = pa ge 415). Oil level in automatic
transmission* Coolant
G
Riskof injury The
coolingsyste mi s pressurised. You
shou ld therefore only unscrew the cap once
the engine has cooled down. You could oth-
er wi se be scald edby hot coolant. P20.30-2149
-31 209en_d2.boo Seite
247 Dienstag, 25. Mai 2004 7:26 19

248 Operation
Engine compartment
The windscreen
washer system and the
headlamp cleaning system have a common
supply from the windscreen washer fluid
re servoir. The reservoir has a capac ityof
either three or six litres (for vehicles with
either the headlamp cleaning system* or
the heate dwindscreen washer reservoir*).
Add windscreen washer concentrate to the
water all year round to prevent smearing.
Use:
! a washer flu idaddit ive, e.g. MB Sum-
merwash, for temperatures above
freezing point, to prevent smearing. !
a washer fluid additive, e.g. MB Winter-
wash, when there is a risk of frost, to
prevent the water from freezing on the
windscreen.
Mix the windscreen was her fluid in a con-
tainer beforehand. Adapt the mixing ratio
to sui tthe outside temperatures.
The windscreen washer fluid reservoir is
located in the front of the engine compart-
ment on the left-hand side when viewed in
the direction of travel.
1 Filling the windscreen washer fluid res-
er vo ir Opening the wash
er fluid reservoir
6 Pull cover 1up by the tab (arr ow). Closing the washer
fluid reservoir
6 Push cov er1 onto the filler neck until
it fully engages.
! Vehicle swith hea dlamp cleaning system*:
On lyuse wind screen washe rfluid which is suita-
ble for plastic lamp lenses. Uns uitabl ewind-
screen wa sherfluidcould damage the plastic
lamp lenses of the headlamps. Windscreen washer system,
headlamp cleaning system*
G
Risk of fire Windscreen washer concentrate is highly
fl am mable. Fire, naked flames and smoking
ar ethere fore prohibit edwhen youare han-
dling windscreen was herco ncentrate. P01
.00- 2226-31 209en_d2.boo Seite
248 Dienstag, 25. Mai 2004 7:26 19

249
Operation
Tyres and wheels
! For safe tyreasons, Mercedes-Benz recom-
mend syou only use tyre swhich have bee nspe-
cially approved for yourvehicle byMercede s-
Benz. These tyres are specially suite dto your
vehicle's control systems, such as ABS or ESP.
Mercedes-Benz can accept no responsibility for
damage resulting from using tyr esother than
those approved for your ve hicle .Information
about tyr esmay be obtained from any
Mercedes-Benz Serv ice Centre.
If you use tyres other tha nthose which have
been test edand recommended for Mercedes-
Benz, cha racteristics suc hashandling, noi se
levels and fuel consum ption may beadversely
affected. Moreo ver, dimensional variations and
different tyre defo rmation characteristics when
running under load could cause the tyre to make
contact with thebo dywork or axle components.
The consequen cecould be damage to the tyre or
to the vehicl e. !
Retreaded tyres are neither tested nor
re commended for Mercedes-Benz vehicle s,as
previous damage cannot always be det ectedon
re treaded tyres. As aresul t, Me rced es-Benz
ca nnot guarantee driving safety.
Modification work on the brake system
and wheels is not permi tted, nor is the use
of spacer plates or brake dust shields. Any
such modifications invalidate the vehicle's
genera loperating permit. !
Only fit tyres and wheels of the same
type and make.
! Onlyfit ty res of the correct size to the
wh eels.
! Run in new tyres at moderate speeds
forthe first 10 0km.
! Check the tyres and wheels for damage
regularly, at least every 14 days. Dam-
aged rims could cause a loss of tyre
pre ssur ean d damag eto th e wheels.
! Check the tyre pressures regularly and
correct them if necessary – see Fuel
fil ler cap (
=pa ge 241).
! Do not continue to use tyres with se-
vere lyworn treads. Tyre grip dec reases
rapidly on wet roads below a tread
depth of 3 mm. Tyres and wheels
G
Risk of accident Only use wheels of the dimensions
stated in
the vehicle registration documents. If other
wheel sizes are used:
! the wheel brakes or chassis compo-
nents could be damaged
! wheel and tyre clearance scan be no
longer guaranteed Poi
nts to bear inmind 209en_d2.boo Seite
249 Dienstag, 25. Mai 2004 7:26 19

250 Operation
Tyres and wheels
!
Fit single new tyres on the front wheels
first if tyres of the same size are fitted
on the front and rear wheels.
! Remove the rust from corr oded steel
wh eels and repaint them.
! Replace the tyres at least every
6years, irrespective of their degree
of wear.
! Adjust the tyre pressures if the vehicle
is laden – see Fuel filler cap
(= page 241).
! Storetyres ina cool, dry place, preferably in
the dark. Protect the tyres from oil, grease,
petrol and diesel.
Do not clean your wheels with acidic wheel
cl eaners since these could corrode the wheel
bolts. Tyres with a specified direction of rotation
offer additional benefi
ts,e.g. with regard
to aquaplaning. These benefits are only
available to you ifthe correct direction of
rotation isobserved.
An arrow on the sidewa llof the tyre indi-
cates its correct direction of rotation.
i A spare wheel* may also be fi tted against
th edirection of rotatio n. The MO
Extended run-flat system allows
you to cont inue driving your vehicle, even
if there is a complete loss of air in one or
more tyres.
You can only use the MO Extendedrun-flat
system in conjunction with the tyre pres-
sure loss warning system.
For notes about driving in the event of a
flat tyre, see the Practical advice section
( = page 373). Direc
tion of rotation MOExtended
run-flat system* 209en_d2.boo Seite
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251
Operation
Tyres and wheels
Only correct the tyre pressures when the
tyres are cold.
The pressures of warm tyres should only
be corrected if the yare too low for the cur-
rent operat ing condi tions. Warm tyres al-
ways have higher tyre pressures than cold
tyres.
You will find a table oftyre pressures for
va rious operating conditions on the inside
of the veh icle's fuel filler flap. i
Tyre pressure values given for low loads are
mi nimum value swhich offer you good ride com-
fort charact eristics.
You can, however, also usethe value sfor higher
lo ads. These are permissible and do not adverse-
ly aff ect the running of thevehicle. However, ride
co mfort will be impaired to som edegree.
Als ocheck thet yre pressure of thespare
wheel*.
Ty re pressure changes by approximately
0. 1b ar for every 10 °C change in ambient
temperature. If you measure the tyre pres-
sures indoors where the temperature dif-
fers from the outside temperature, you will
have to correct the measured values ac-
cor dingly.
When the vehicle isdriven, the tyre tem-
perature, and wi thit the tyre pressure, in-
crease as a function of the road speed and
the load on the tyres. During the journey, the tyre pressure loss
warning system monitors the set tyre pres-
sure by comparing the speed of rotation of
the
wheels. This enables the system to de-
tect whether there has been a significant
drop in tyre pressure in one of the tyres. If
the rotation speed of a wheel changes be-
cause of a drop in tyre pressure, a corre-
sponding warning message appears in the
multi -function display. Tyre pr
essure G
Risk of accident If the press
urein a tyre drops repeatedly:
! inspect the tyre for foreign objects
! check whether the wheel or valve is
leaking H
Environmental note Ch
eck the tyre pressures regularly, at least
every 14days. Tyre pressure loss war
ning system 209en_d2.boo Seite
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252 Operation
Tyres and wheels
The tyre pressure loss warning system is
restricted in its function ordelayed if:
! snow chains are fitted to your vehicle
! road and traffic con ditions are affected
by wintry conditions
! you are driving ove ra loose surface
(e.g. sand or gravel)
! you adopt a sporty driving style (with
high cornering speed or rapid accelera-
tion)
! you are driving with a very heavy or
large trailer
! you are driving with roof loads or very
heavy loads Reactivating the
tyre pressure loss warning feature
You must reactivate the tyre pressure
loss
warning featur ein the following cases, if
you:
! have changed the tyre pressure
! have changed the wheels or tyres
! have fitted new wheels or tyres
6 Before reactivating, make sure that the
tyre pressure of all four tyres is set cor-
rectly for local driving conditions using
the table on the inside of the fuel filler
flap.
6 Make sure that the ignition is switched
on. G
Riskofaccident The tyre pressure loss warning system does
not warn
youof an inco rrectly set tyre pres-
sure. The table on the inside of the fuel filler
flap will help you to decide whether the tyre
pressur eshould be corrected.
The tyre pressure loss warning system isnot
a substitute for check ing the tyre pressures
on a regular basis sin ceequal pre ssureloss
in all fo urtyres cannot be detected by the
tyre pressure loss warning system.
Th etyre pressure loss warning system isnot
able to warn you of a sudden loss of pres-
sure, e.g. following penet ration by aforeign
obje ct. In such cases ,stop th evehicle by
braking carefully. Do notma keany sudden
steering movements. G
Risk of accident Th
ety re pre ssureloss warning system can
only work reliably if you have set the tyre
pressure correctly.
If an incorr ect tyre pressure is set, this in-
correct value will be monitored. 209en_d2.
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253
Operation
Tyres and wheels
The standard display app ears in the multi-
function display ( =page 112).
6 Press the jork button on the
multi-function steering wheel repeat-
edly until the following message ap-
pears in the multi-function display:Ty re pressure monitor Reactivation
us ingæ
6 Press the æbutton on the multi-
function steering wheel.
The fo llowing message appears inthe
display:
Ty re press. nowOK?
If you want to confirm activation:
6Press the æbutton on the multi-
function steering wheel again.
The following message appears inthe
display:
Ty re pressure monitoring
reactivated
After a certain teach-in period, the tyre
pressure loss warning feature monitors
the wheels for loss of pressure. If you want to cancel act
ivation:
6 Press the çbutton on the mul ti-
function steering wheel.
or
6 Wait until the
Tyre press. now OK?
message disappears.
On vehicles with the same size wheels at
the front and rear, the wheels can be inter-
changed every 5,000 to 10,000 km, de-
pend ing on the degree of tyre wear. The
same direction of rotation must be main-
tained. The front and rear wheels wear differently,
depending on the operating conditions.
Interchange the
wheels before too definite
a wear pattern forms on the tyres. The
front tyres typically wear more on the out-
er shoul der, and the rear tyres in the cen-
tre of the tread.
Each time you interchange the wheels,
you should clean the contact areas on the
wheels and brake discs thoroughly. Check
the tyre pressures. Interchanging wh
eels G
Risk of accident Interchange th
efront and rear wheels only if
th ey have the same dimensions, e.g. size,
tread depth, etc. 209en_d2.
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