2004 MERCEDES-BENZ CLK CABRIOLET ESP

206 Controls in detail
Driving systems
Ot
her vehicles changing lane
Distronic has stil l not detecte dthe vehicle
changing lane. The distance to the vehicle
changing lane will be too short. Narrow vehicles
Distronic has st
ill not detected the vehicle
in front on the edge of the carriagew ay
because itis narrow. The distance to the
vehicle in front will be too short. Speedtronic ensures that you do not
exce
edthe stored speed. You can set a
va riable or permanent speed limit:
Variab le forspeed limits, e.g. inbuilt-
up areas ( =page 207)
Permanent for long-term speed restr ic-
tions, e.g. for driving on win-
ter tyres ( =page 211)
i The speed indicated in the speedometer
may differ sli ghtly from th espeed limit stored.
P54.70-2215-31 P54.70-2216-31 Speedtronic
G
Risk of accident Speedtronic is on
lyan ai d designed to assist
drivi ng.You are responsible for th evehicle's
speed and for br aking in good time. 209en_d2.boo Seite
206 Dienstag, 25. Mai 2004 7:26 19

207
Controls in detail
Driving systems Variable Speedtronic
The cruise control
lever is used to operate:
! cruise control or Distronic*
! variable Speedtronic
The cruise control lever is the uppermost
lever on the left of the steering column
( = page 192).
The LIM indicator lamp on the cruise con-
trol lever indicates which system you have
se lected:
! Cruise control, Distronic*:
LIM indicator lamp off
! Speedtronic:
LIM indicator lamp lit
When the engine isrunning, you can use
the cruise control lever to limi tthe vehi-
cle's speed to any speed:
! from 30 km /hupwards using cruise
control
! from 10 km /hupwards using
Distronic* 1
To store the current speed or a higher
speed
2 To store the current speed or a lower
speed
3 To dea ctivat eth e variable speed limiter
4 To call up the last stored var iable limit
speed or to make a fine adjustment in
in crements of 1 km /h
5 To switch between cruise control,
Distronic* and variab leSpeedtronic
6 LIM indicator lamp Selecting variable Spe
edtronic
1 LIM indicator lamp
2 To select variab leSpeedtronic
6 Check whether Speedtronic is select-
ed. LIM indicator lamp 1must then
light up.
6 Otherwise, press the cru ise control
lever in the direction of arrow 2.
LIM indicator lamp 1lights up.
Sp eedtronic is selected.
P54.25-3820-31 209en_d2.
boo Seite 207 Dienstag, 25. Mai 2004 7:26 19

209
Controls in detail
Driving systems
or
6 Press the cruise control lever briefly in
the direction of arrow 2.
The current speed is stored.
All models exce ptCLK 500:
Speedtronic rounds the speed down to
the next multiple of 10 km /h.
The stored speed is shown in the mul ti-
function display. The segments in the
speedometer from the start of the scale up
to the stored speed light up.
i Allmo dels except CLK 500 and vehicles
with Distronic*
Sp eedtron ic maybe unabl etoprevent thespeed
limit fro mbeing exceeded on downhill gradients.
If th is happens:
! a signal sounds
! you will see theLIMIT exceeded!message
in the multi-function display
You should then brake yourself if necessary. Resuming a stored speed
1 To resume a stored speed
6 Press the cruise control lever briefly in
the direction of arrow 1.
If the vehicle is travel ling at a maximum
of 30 km /habove the stored speed
li mi t,Sp eedtro nicadjusts the vehicle's
speed to the last speed stored. Adjustment in 10 km
/hincrements
1 Toadjust: 10 km /hfaster
2 To adjust: 10 km /hslower
Higher speed 6 Pressthe crui secontro l le ver briefly in
the direction of arrow 1.
or
6 Press and hold the cruise control
lever in the direction of arrow 1until
th ede sired speed has been reached. 209en_d2.boo Seite
209 Dienstag, 25. Mai 2004 7:26 19

211
Controls in detail
Driving systems
6 Press the cruise control lever briefly in
the direction of arrow 2.
Variable Speedtronic is deactivated.
The LIM indicator lamp goes out.
Cruise control or Distronic* is
selected.
Variab leSpeedtronic is deactivated auto-
matically:
! if yo udep ress the acceler ator pedal
beyond the pressure point (kickdown)
! and, atthe sam etime, your current
driv ing sp eed differs from the stored
speed by no more than 20 km /h Permanent Speedtronic
1
You can use the operating system to limit
the speed permanently to a value between
160 km /h(e.g. for driving on winter tyres)
an d the maximum speed.
If you wish to use Speedtronic to set a
speed limit for dr iving with winter tyres,
you must:
! deactivat ethe key-dependent pro-
gram ming (
=page 130)
or ! set the same speed limit for all keys
1O nly applies to the Fede ral Republic ofGe rmany It
is only possible to set or clear permanent
Speedtronic when the vehicle is stat ionary.
Permanent Speedtronic rema ins activ ated,
even if var iable Speedtronic is deactivated.
The stored speed is shown in the multi-
function displa yshortly before this speed
is reached.
You can not exceed the stored speed limit,
even if you depress the accelerator pedal
beyond the pressure point (kickdown).
Setting permanent Speedtronic
6 Make sure that the ignition is switched
on.
6 Press the èorÿ button repeat-
edly until you see theSettingsmenu in
the multi-function display
(
= page 116). G
Risk of accident It is not possible to deactivate Variable
Speedtronic by brak
ing. 209en_d2.boo Seite
211 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
250 Dienstag, 25. Mai 2004 7:26 19

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
251 Dienstag, 25. Mai 2004 7:26 19

257
Operation
Winter driving
Have your vehicle winterproofed at a
qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre, at the on-
set of winter. This servi ceincludes the fol-
lo wi ng:
! Engine oil change,
if the current oil used has not been
approved for winter use
! The antifreeze /anti-corrosion
concentration is checked
! A concentrated cleanin gagent is
added to the windscreen and headl amp
cleaning system fluid*
! The battery is checked
! A tyre change Us
ewinter tyres at temperatures below
+7 °C and on snow or ice-covered roads.
Th e maximum effect of the ABS and ESP
dri ving systems is on lyachieved in win ter
with these tyr es.
Us ewinter tyres of the same make and
tread on all wheels to maintain safe han-
dling characteristics. Always observe the maximum permitted
speed sp
ecified for the winter tyres you
have fitted. If you fit winter tyres whi ch
have a lower maximu mpermitt ed speed
than that of the vehicle, affix an appropri-
ate warning sign in the driver's field of
vision. This ca nbe obtained at a qualified
specialist workshop, e.g. at a Mercedes-
Benz Service Centre.
In such circumstances, you should also
restrict the maximum speed of the vehicle
to the maximum permitted speed for the
winter tyres using permanent Speedtronic
( = pa ge 211). Winter dri
ving Win
terty res* G
Risk of accident You must re
place wint ertyres with tread
de pth sof less than 4 mm immediately.
These tyres are no tsuitable for use in winter
an d do not provide sufficient grip. You could
therefore lose control of the vehicle and
cause an accide nt. 209en_d2.boo Seite
257 Dienstag, 25. Mai 2004 7:26 19