engine MERCEDES-BENZ CLS COUPE 2008 Repair Manual

Engine compartment
197
X
Top up the coolant if necessary.
X Replace cap 1 and tighten all the way to
the stop.
You will find further information about coolant
in the "Technical data" section
(Y page 316). Windscreen washer system/head-
lamp cleaning system*
The washer fluid reservoir is located in the
engine compartment on the right when
viewed in the direction of travel. The head-
lamp cleaning system* is also supplied from
the washer fluid reservoir.1 Cover X
Add windscreen washer concentrate to the
washer fluid all year round.
G Risk of fire
Windscreen washer concentrate is highly
flammable. Fire, naked flames and smoking
are prohibited when windscreen washer
concentrate is being handled.
Use
R a windscreen washer fluid additive
such as MB Summerwash to prevent
smearing (for temperatures above freez-
ing).
R a windscreen washer fluid additive with
antifreeze properties such as MB Winter-
wash (if there is a risk of frost).
X Mix the windscreen washer fluid in a con-
tainer beforehand. Adapt the mixing ratio
to the outside temperatures.
! Only use windscreen washer fluid which
is suitable for plastic lamp lenses. Unsuit-
able windscreen washer fluid could dam-
age the plastic lamp lenses of the head-
lamps. X
To open: pull cap 1 upwards by the tab.
X To close: press cap 1 onto the filler neck
until it clicks into place.
Operation
* optional
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Winter driving
205required. Mercedes-Benz recommends
that you use a Mercedes-Benz Service
Centre
for this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at a qualified
specialist workshop. Snow chains
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains which
have

been specially approved for your vehicle
by Mercedes-Benz or are of a corresponding
standard of quality.
! Information about the use of snow chain-
compatible AMG winter tyres is applicable
for AMG tyres. Use of snow chains is only
permissible with these tyres.
If you intend to fit snow chains, please bear
the following points in mind: R
Snow
chains cannot be fitted to all wheel/
tyre combinations.
R Snow chains must not be fitted to emer-
gency spare wheels, e.g. the "Minispare" or
collapsible emergency spare wheel.
R Fit snow chains to both rear wheels. Com-
ply with the manufacturer's installation
instructions.
! If snow chains are fitted to the front
wheels, they may come into contact with
the bodywork and axle components when
the vehicle is in motion and damage the
tyre or the vehicle.
On vehicles with AIRMATIC DC*, you must
only drive at raised vehicle level if snow
chains have been fitted (Y page 146).
Do not exceed the maximum permissible
speed of 50 km/h.
i You may wish to deactivate ESP ®
when
pulling away with snow chains fitted
(Y page 59). This way you can allow the
wheels to spin in a controlled manner, ach-
ieving an increased driving force (cutting
action). Winter driving
G
Risk of accident
Do not shift down for additional engine
braking on a slippery road surface. This
could cause the drive wheels to lose their
grip and the vehicle could skid.
You

should drive particularly carefully on slip-
pery road surfaces. Avoid sudden accelera-
tion, steering and braking manoeuvres.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the selector lever to N.
X Try to bring the vehicle under control using
corrective steering. Operation
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Driving tips
206 Driving tips
Rolling with the engine switched off
G
Risk of accident
Never switch the engine off while the vehi-
cle is in motion.
There
is no power assistance for the steer-
ing and the service brake when the engine
is not running.
You will require considerably more effort to
steer and brake and you could therefore
lose control of the vehicle and cause an
accident. Braking
G
Risk of accident
Do not change down for additional engine
braking on a slippery road surface. This
could cause the drive wheels to lose their
grip and the vehicle could skid. G
Risk of accident
Make sure that other road users are not
endangered by your braking. Downhill gradients On long and steep downhill gradients, espe-
cially if the vehicle is laden, you must select
shift range 1, 2 or 3 in good time.
i
This also applies if you have activated
cruise control, Speedtronic or Distronic*

.
This uses the braking effect of the engine and
you will not have to brake to such an extent
to maintain the same speed. This relieves the
load on the brake system and prevents the
brakes from overheating and wearing too
quickly. If you need additional braking,
depress the brake pedal repeatedly rather
than continuously.
Heavy and light loads If the brakes have been subjected to a heavy
load,

do not stop the vehicle immediately, but
drive on for a short while. This allows the air-
flow to cool the brakes more quickly. G
Risk of accident
Never depress the brake pedal continu-
ously while the vehicle is in motion, e.g.
never cause the brakes to rub by applying
constant

slight pedal pressure. This causes
the brake system to overheat, increases the braking distance and can lead to the
brakes failing completely.
If

the brakes have been used only moderately,
you should occasionally test their effective-
ness. To do this, brake more firmly from a
higher speed. This improves the grip of the
brakes.
Wet roads If driving in heavy rain for a prolonged period
of time without braking, there may be a
delayed

reaction from the brakes, when brak-
ing for the first time. You must brake harder.
You must therefore maintain a greater dis-
tance from the vehicle in front.
Brake firmly after driving on a wet road. This
way the brake discs will become warm, drying
more quickly, which will protect them against
corrosion.
Limited braking performance on salted
roads G
Risk of accident
The layer of salt on the brake discs and the
brake pads/linings may cause a delay in
the braking effect, resulting in a signifi- Operation
* optional
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Driving abroad
208 Driving on wet roads
If water has accumulated to a certain depth
on
the road surface, there is a danger of aqua-
planing occurring, even if:
R you drive at low speeds
R the tyres have adequate tread depth
For this reason, do not drive in tyre ruts, and
brake carefully. Driving on flooded roads
If you have to drive on stretches of road on
which water has collected, please bear in
mind that:
R The

maximum permitted depth in still water
is 25 cm.
R You should drive no faster than at walking
pace.
! Bear in mind that vehicles travelling in
front or in the opposite direction create
waves. This may cause the maximum per-
missible water depth to be exceeded.
You must observe these notes, otherwise
damage may occur to the engine, electrics
and transmission. Driving abroad
An
extensive Mercedes-Benz Service network
is also available in other countries. You can
obtain the relevant workshop directories
from any Mercedes-Benz Service Centre.
Only low-octane fuel is available in certain
countries.
You can find further information about fuel
grades on ( Y page 190). Symmetrical dipped beam
If your journey takes you to countries where
vehicles

are driven on the opposite side of the
road to the country in which the vehicle is
registered, your headlamps must be switched
to symmetrical dipped beam. Oncoming traf-
fic will be dazzled less.
X Have the headlamps switched over at a
qualified specialist workshop, e. g. a
Mercedes-Benz Service Centre. G
Risk of accident
Have your headlamps switched back to
asymmetrical dipped beam if you visit a
country

in which traffic drives on the same
side of the road as in the country in which
your vehicle was registered. You may oth- erwise dazzle the oncoming traffic and
could cause an accident.Operation
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Where will I find...?
217Fire extinguisher*
i Have the fire extinguisher refilled after
each use and checked every one or two
years. Otherwise, it may fail in an emer-
gency.
Observe the legal requirements in all coun-
tries concerned.
The fire extinguisher is located in the stowage
compartment underneath the driver's seat.1 Handle
X To open: pull handle 1 up.
X Fold the cover forwards.
X Remove the fire extinguisher.
Vehicle tool kit, jack and spare
wheel*
The vehicle tool kit is located in a stowage
compartment underneath the boot floor.
G Risk of injury
The jack is designed only to raise and hold
the vehicle for a short time while a wheel
is being changed.
If you are carrying out work on the vehicle,
you must use stands.
Make sure that the jack is placed on a firm,
non-slip and level surface. Do not use
wooden blocks or similar objects as a jack
underlay. Otherwise, the jack will not be
able to achieve its load-bearing capacity
due to the restricted height.
Do not start the engine at any time while a
wheel is being changed.
Do not lie under the vehicle when it is being
supported by the jack. If you do not raise
the vehicle as described, it could slip off the
jack (e.g. if the engine is started or a door
or the boot lid is opened or closed) and you
could be seriously injured.
i When using the jack, you should also
observe the safety notes in the "Flat tyre"
section ( Y page 276). X
Fold up the boot floor and hook the retainer
into the top of the boot frame.
Vehicles with a TIREFIT kit
1 Vehicle tool kit, jack, warning triangle
2 Electric air pump
3 TIREFIT kit
Practical advice
* optional
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Display messages
222 Display messages Possible cause/consequence Possible solution
DISTRONIC currently unavail-
able See Owner's
Manual
Distronic* is deactivated and is tempora-
rily inoperative, if:
R
the Distronic*
cover in the radiator
grille is dirty
R its function is impaired due to heavy
rain, snow or fog.
R the radar sensor system is temporarily
unavailable, e.g. because of electro-
magnetic radiation.
R The radar sensor system has not detec-
ted any vehicles or stationary objects,
e.g. traffic signs, for a long time.
R The system has overheated. Distronic* is available again and the display mes-
sage disappears when the dirt (e.g. slush) falls off
while you are driving or if the system detects that
the sensors are fully available again.
If the display message does not disappear:
X
Clean the Distronic* cover in the radiator grille
(Y page 213).
X If necessary, wait until the system has cooled
down.
X Restart the engine. ESP
also lights up:
v inoperative See
Owner's Manual
G
Risk of accident
ESP ®

and therefore also Brake Assist and
PRE-SAFE ®
are unavailable due to a mal-
function.
The brake system is still available with
complete brake boosting effect. X
Drive on carefully.
X Visit a qualified specialist workshop. Practical advice
* optional
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Display messages
223Display messages Possible cause/consequence Possible solution
P Selector lever in
park position You have switched off the engine with the
KEYLESS
GO button* and opened the driv-
er's door.
or
With HOLD activated, you have either:
R opened the driver’s door and released
the seat belt or
R switched off the engine or
R opened the bonnet
The horn may also sound at regular inter-
vals. The horn becomes louder if you
attempt to lock the vehicle.
The engine cannot be started. X
Move the selector lever to P.
The engine can be started again. P Selector lever in
park position You have tried to switch off the engine
with the KEYLESS GO button*

while the
selector lever is in position R or D. X
Move the selector lever to P. Please shift to P or N You have attempted to start the engine
while the selector lever is not in position
P or N. X
Move the selector lever to P or N. PRE-SAFE inoperative See
Owner's Manual
PRE-SAFE
®
has failed. All other occupant
safety
systems, e.g. airbags, remain avail-
able. X
Visit a qualified specialist workshop. Practical advice
* optional
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Display messages
227Display messages Possible cause/consequence Possible solution
HOLD cannot be activa-
ted See Owner's
Manual A condition for activating HOLD has not
been met. Check the conditions for activating HOLD
(Y page 144).
X
Close the bonnet.
X Close the driver's door.
X Start the engine.
X Release the parking brake.
X Switch off all consumers that are not required.
HOLD can be reactivated as soon as the on-
board voltage is sufficient. HOLD inoperative See
Owner's Manual A malfunction has occurred. X
Visit a qualified specialist workshop. Cruise control
and SPEEDTRONIC inoperative Speedtronic and cruise control or Dis-
tronic* are not operational. X
Visit a qualified specialist workshop. SRS Restraint system
malfunction Con-
sult workshop The restraint systems are faulty. X
Visit a qualified specialist workshop immedi-
ately. Cruise control - - - A condition for activating cruise control
has not been met. X
Activate ESP ®
(Y page 59)
X If conditions permit, drive faster than
30 km/h
and store the speed (Y page 132). Practical advice
* optional
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Display messages
229Display messages Possible cause/consequence Possible solution
V At least one door is open. The display
symbol shows you which doors are open. X
Close the doors. D The cooling fan for the coolant is faulty. X
If the coolant temperature is less than 120†,
you can continue driving to the nearest quali-
fied specialist workshop.
X In doing so, avoid heavy loads on the engine
(e.g. driving in mountainous terrain) and stop-
and-go driving. @ Vehicle rising
Vehicles with AIRMATIC Dual Control*:
your vehicle is adjusting to the level you
have selected.
@ Vehicle rising
Please wait
Vehicles with AIRMATIC Dual Control*:
the
vehicle level is too low when the vehi-
cle is stationary. X
Do not pull away.
X Wait until the display message disappears.
The vehicle has reached the level required for
driving. Practical advice
* optional
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Display messages
230 Display messages Possible cause/consequence Possible solution
@ STOP Car too low
G
Risk of accident
AIRMATIC Dual Control* is faulty. !
Avoid large steering angles, otherwise the
wing or the tyres could be damaged when you
drive on. Listen for scraping sounds.
X Do not exceed a maximum speed of 80 km/h .
X Pull over and select a higher vehicle level.
The vehicle may be raised, depending on the
type of fault.
X Visit a qualified specialist workshop immedi-
ately. @ Malfunction
The AIRMATIC Dual Control* function is
restricted. The vehicle's handling charac-
teristics may be affected. X
Do not exceed a maximum speed of 80 km/h
.
X Visit a qualified specialist workshop. 2 Brake wear The brake pads/linings have reached
their wear limit. X
Have the brake pads/linings replaced as soon
as possible at a qualified specialist workshop. 3 Brake immediately A malfunction occurred with HOLD acti-
vated.
The horn may also sound at regular inter-
vals. The horn becomes louder if you
attempt to lock the vehicle.
The engine cannot be started. X
Immediately depress the brake pedal firmly
until

the warning message in the multi-function
display disappears.
X Prevent the vehicle from rolling away before
you leave it

(Y page 103).
The engine can be started again. Practical advice
* optional
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