2008 MERCEDES-BENZ CLS COUPE check engine light

5
Central locking
Automatic locking (on-board com-
puter) . . . . . . . . . . . . . . . . . . . . . . . 127
Key . . . . . . . . . . . . . . . . . . . . . . . . . . 66
KEYLESS GO . . . . . . . . . . . . . . . 68, 69
Central locking/unlocking button . . . 70
Central unlocking Key . . . . . . . . . . . . . . . . . . . . . . . . . . 66
KEYLESS GO . . . . . . . . . . . . . . . 68, 69
Centre console
Lower section . . . . . . . . . . . . . . . . . . 32
Upper section . . . . . . . . . . . . . . . . . . 34
Changing a wheel
see Flat tyre
Child-proof locks
Rear doors . . . . . . . . . . . . . . . . . . . . 56
Side windows (rear) . . . . . . . . . . . . . 56
Children
in the vehicle . . . . . . . . . . . . . . . . . . 49
Restraint systems . . . . . . . . . . . . . . 49
Child seat
Automatic recognition . . . . . . . . . . . 51
Automatic recognition (malfunc-
tion) . . . . . . . . . . . . . . . . . . . . . . . . 243
ISOFIX . . . . . . . . . . . . . . . . . . . . . . . 55
Recommendations . . . . . . . . . . . . . . 54
Suitable positions . . . . . . . . . . . . . . 53
Cigarette lighter . . . . . . . . . . . . . . . . 181
Cockpit Overview . . . . . . . . . . . . . . . . . . . . . 22 Collapsible wheel
Pumping up . . . . . . . . . . . . . . . . . . 285
Storage location . . . . . . . . . . . . . . . 218
Technical data . . . . . . . . . . . . . . . . 308
COMAND . . . . . . . . . . . . . . . . . . . . . . . 114
On-board computer . . . . . . . . . . . . 114
Constant headlamp mode
Setting (on-board computer) . . . . . 125
Consumption statistics (on-board
computer) . . . . . . . . . . . . . . . . . . . . . . 130
Convenience closing . . . . . . . . . . . . . 100
Coolant . . . . . . . . . . . . . . . . . . . . . . . . 196
Checking the level . . . . . . . . . . . . . 196
Display message . . . . . . . . . . 229, 232
Mixture ratio . . . . . . . . . . . . . . . . . 316
Temperature gauge . . . . . . . . . . . . 110
Warning lamp . . . . . . . . . . . . . . . . . 246
Cruise control . . . . . . . . . . . . . . . . . . 132
Display message . . . . . . . . . . . . . . 227
Cup holder . . . . . . . . . . . . . . . . . . . . . 172 D
Dashboard see Cockpit


Date
Setting (on-board computer) . . . . . 124
Daytime driving lights
see Constant headlamp mode Delayed switch-off
Exterior lighting (on-board com-
puter)

. . . . . . . . . . . . . . . . . . . . . . . 126
Interior lighting (on-board com-
puter) . . . . . . . . . . . . . . . . . . . . . . . 126
Diesel
Low outside temperatures . . . . . . . 193
Diesel engine
Winter driving . . . . . . . . . . . . . . . . . 193
Digital speedometer . . . . . . . . . . . . . 116
Dipped-beam headlamps Automatic headlamp mode* . . . . . . 92
Display message . . . . . . . . . . . . . . 233
Symmetrical . . . . . . . . . . . . . . . . . . 208
Display message . . . . . . . . . . . . . . . . 219
Displaying . . . . . . . . . . . . . . . . . . . 121
Service display . . . . . . . . . . . . . . . . 209
Symbol messages . . . . . . . . . . . . . 228
Text messages . . . . . . . . . . . . . . . . 220
Up (AMG menu) . . . . . . . . . . . . . . . 116
Distance warning function . . . . . . . . 138
Distance warning lamp . . . . . . . . . . . 138
Distronic . . . . . . . . . . . . . . . . . . . . . . . 135
Cleaning the sensors . . . . . . . . . . . 213
Cover . . . . . . . . . . . . . . . . . . . . . . . 213
Display message . . . . . . . . . . . . . . 221
Distance warning function . . . . . . . 138
Driving tips . . . . . . . . . . . . . . . . . . . 141
Warning lamp . . . . . . . . . . . . . . . . . 245 Index
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8
Head restraint
Adjusting (front) . . . . . . . . . . . . . 76, 77
Adjusting (rear) . . . . . . . . . . . . . . . . 78
Luxury . . . . . . . . . . . . . . . . . . . . 76, 77
NECK-PRO . . . . . . . . . . . . . . . . . . . . 49
Resetting triggered head
restraints . . . . . . . . . . . . . . . . . . . . 269
Heating
see Air conditioning
High-pressure cleaners . . . . . . . . . . . 211
HOLD . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Display message . . . . . . . . . . . . . . 226 I
Immobiliser

. . . . . . . . . . . . . . . . . . . . . 61
Indicator and warning lamp Brakes (red) . . . . . . . . . . . . . . . . . . 245
Coolant . . . . . . . . . . . . . . . . . . . . . 246
Distronic (red) . . . . . . . . . . . . 138, 245
Engine diagnostic . . . . . . . . . . . . . . 247
ESP ®
. . . . . . . . . . . . . . . . . . . . 59, 244
LIM . . . . . . . . . . . . . . . . . . . . . . . . . 133
PASSENGER AIRBAG OFF . . . . 51, 242
Reserve fuel . . . . . . . . . . . . . . . . . . 250
Seat belt . . . . . . . . . . . . . . . . . . . . . 249
SRS . . . . . . . . . . . . . . . . . . . . . 43, 248
Tyre pressure monitor . . . . . . . . . . 248
Indicator and warning lamps . . . . . . 244 Indicator lamp
see Indicator and warning lamp

Instrument cluster . . . . . . . . . . . . . . 109
Overview . . . . . . . . . . . . . . . . . . . . . 26
Selecting the language (on-board
computer) . . . . . . . . . . . . . . . . . . . 123
Instrument lighting . . . . . . . . . . . . . . 110
Interior lighting . . . . . . . . . . . . . . . . . . 96
Ambient (on-board computer) . . . . 126
Automatic control . . . . . . . . . . . . . . 96
Delayed switch-off (on-board
computer) . . . . . . . . . . . . . . . . . . . 126
Manual control . . . . . . . . . . . . . . . . . 96
Reading lamp . . . . . . . . . . . . . . . . . . 96
Interior motion sensor . . . . . . . . . . . . 62
ISOFIX child seat securing system . . 55 J
Jack Operation

. . . . . . . . . . . . . . . . . . . . 283
Storage location . . . . . . . . . . . . . . . 217
Jump-starting . . . . . . . . . . . . . . . . . . . 291
Jump leads . . . . . . . . . . . . . . . . . . . 291 K
Key

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Changing the battery . . . . . . . . . . . 270
Checking the battery . . . . . . . . . . . 270
Convenience closing . . . . . . . . . . . 101 Display message

. . . . . . . . . . . . . . 238
Factory setting . . . . . . . . . . . . . . 66, 67
Loss . . . . . . . . . . . . . . . . . . . . . . . . 261
Malfunction . . . . . . . . . . . . . . . . . . 261
Modifying the programming . . . . . . . 66
KEYLESS GO . . . . . . . . . . . . . . . . . . . . . 67
Button . . . . . . . . . . . . . . . . . . . . . . . 74
Changing the battery . . . . . . . . . . . 270
Checking the battery . . . . . . . . . . . 270
Closing the boot lid automatically . . 73
Convenience closing . . . . . . . . . . . 101
Factory settings . . . . . . . . . . . . . . . . 68
Losing the key . . . . . . . . . . . . . . . . 264
Malfunction . . . . . . . . . . . . . . . . . . 263
Modifying the programming . . . . . . . 68
Starting the engine . . . . . . . . . . . . 102
Key positions
Key . . . . . . . . . . . . . . . . . . . . . . . . . . 74
KEYLESS GO . . . . . . . . . . . . . . . . . . 74
Kickdown . . . . . . . . . . . . . . . . . . 107, 109 L
Lamps see Indicator and warning lamp


Language
Selecting (on-board computer) . . . 123
Licence plate lighting
Display message . . . . . . . . . . . . . . 235
Lighting
see Lights Index
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Exterior view
21Function Page
1 Boot
Opening and closing 70
Spare wheel 217
Vehicle tool kit 217
Vehicle battery 288
2 Rear lights
271
3 Rear window heating
164
4 Fuel filler flap
190
Fuel requirements 191
5 Opening and closing the
doors
66
6 Demisting the windscreen
163
Cleaning the windows 212
7
Sliding/tilting sunroof* 169
8 Exterior mirrors
84
Parking aid*
85 Function Page
9 Windscreen wipers, opera-
tion
97
Cleaning the wiper blades 211
Replacing the wiper blades 275
a Opening the bonnet
193
Engine oil 195
Coolant 196
b Front lights
271
c Fitting the front towing eye
293
d Tyres and wheels
198
Checking the tyre pressure 200
Flat tyre, fitting the spare
wheel
276
e Fitting the rear towing eye
293 At a glance
* optional
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Occupant safety
43In particular, work relevant to safety or on
safety-related
systems must be carried out
at a qualified specialist workshop. If this
work is not carried out correctly, the oper-
ating safety of your vehicle may be affec-
ted. There is a risk of an accident and injury. SRS (Supplemental Restraint System)
The SRS reduces the risk of occupants com-
ing into contact with the vehicle's interior in
the event of an accident. It can also reduce
the forces to which occupants are exposed
during an accident.
The SRS consists of:
R 1 warning lamp
R belt tensioners
R belt force limiters
R Airbags
1 warning lamp The SRS functions are checked regularly
when you turn on the ignition and when the
engine

is running. Malfunctions can therefore
be detected in good time. The 1 warning lamp in the instrument
cluster

lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
Risk of injury
If SRS is malfunctioning, individual systems
may be activated unintentionally or not be
triggered in the event of an accident with
heavy braking.
A malfunction has occurred if the 1
warning lamp:
R does

not light up when you switch on the
ignition
R does not go out after the engine has been
running for a few seconds
R lights up again once the engine is running
In this case, have SRS checked immedi-
ately at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags In the event of a collision, the sensor in the
airbag

control unit evaluates important phys-
ical data such as duration, direction and force
of the vehicle deceleration or acceleration.
Based on the evaluation of this data and depending on the vehicle's rate of longitudi-
nal deceleration in a collision, in the first
stage the airbag control unit pre-emptively
triggers the belt tensioners.
i
The

front belt tensioners can only be trig-
gered if the belt tongue is correctly
engaged in the seat belt buckle.
The front airbags are only deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Vehicles fitted with adaptive, dual-stage front
airbags: when the first deployment threshold
is reached, the front airbag is filled with
enough gas to reduce the risk of injuries. The
front airbag is only fully inflated if a second
threshold is reached within a few millisec-
onds due to the control unit having detected
further deceleration.
Criteria for triggering belt tensioners and
airbags
In the first stage of a collision, the airbag con-
trol unit evaluates the duration and direction
of vehicle acceleration or deceleration in
order to determine whether it is necessary to
trigger the belt tensioner and/or airbag.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to the
rate of deceleration of the vehicle. This proc- Safety
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Driving systems
143
Selecting variable Speedtronic X
Check whether LIM indicator lamp 2 is on.
If it is on, variable Speedtronic is already
selected.
If it is not, press the cruise control lever in
the direction of arrow 5.
LIM indicator lamp 2 in the cruise control
lever lights up. Variable Speedtronic is
selected. G
Risk of accident
If there is a change of drivers, advise the
new driver of the limit speed stored.
Only use variable Speedtronic if you are
sure that you will not have to accelerate
suddenly to a speed above that stored as
the

limit speed, otherwise you could cause
an accident.
You can only exceed the limit speed stored
if you deactivate variable Speedtronic:
R using the cruise control lever
R if you depress the accelerator pedal
beyond the pressure point (kickdown)
It is not possible to deactivate variable
Speedtronic by braking. Storing the current speed You can use the cruise control lever to limit
the

speed to any speed above 30 km/h while
the engine is running.
X Briefly press the cruise control lever up
1 or down 4.
The current speed is stored. The stored
speed,

e.g. LIM km/h , appears in the multi-
function display.
The segments in the speedometer from the
start of the scale up to the stored speed
light up.
Selecting the current or last stored
speed X
Briefly pull the cruise control lever towards
you 3.
Adjustment in 10 km/h increments X
Briefly press the cruise control lever up
1 for a higher speed or down 4 for a
lower speed.
or
X Keep the cruise control lever pressed until
the desired speed is set. Press the cruise control lever, up 1 for a higher speed or
down 4 for a lower speed.
Making fine adjustments in 1 km/h
increments X
For a higher speed: briefly pull the cruise
control lever towards you 3.
or
X Keep the cruise control lever pulled
towards you 3 until the desired speed is
set.
Deactivating variable Speedtronic There are several ways to deactivate variable
Speedtronic:
X
Briefly press the cruise control lever for-
wards 6.
or
X Briefly press the cruise control lever in the
direction of arrow 5.
LIM

indicator lamp 2 in the cruise control
lever goes out. Variable Speedtronic is
deactivated.
Cruise control or Distronic* is selected. Controls
* optional
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Display messages
237Display messages Possible cause/consequence Possible solution
N Check engine oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 195) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. ± Display malfunc-
tion Consult work-
shop One or more electronic systems are
unable to deliver information to the on-
board computer. The following systems
may have failed:
R
Coolant temperature gauge
R Rev counter
R Cruise control or Speedtronic display X
Visit a qualified specialist workshop. H Tyre pressure Cau-
tion Tyre defect One or more tyres are losing air rapidly.
The affected wheel is highlighted in the
tyre pressure display of the tyre pressure
monitor*. X
Stop the vehicle without making any sudden
steering

or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Repair or change the tyre (Y page 276). Practical advice
* optional
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Display messages
238 Display messages Possible cause/consequence Possible solution
H Tyre pressure
Check tyres The pressure in one or more tyres has
dropped significantly. The affected wheel
is highlighted in the tyre pressure display
of the tyre pressure monitor*. X
Stop the vehicle without making any sudden
steering
or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Check the tyres.
X Repair or change the faulty tyre if necessary
(Y page 276).
X Check the tyre pressure and correct it if nec-
essary ( Y page 200).
The warning will disappear automatically after
you have been driving for a few minutes with
the corrected tyre pressure. I Change key batter-
ies
The batteries of the KEYLESS GO key* are
discharged. X
Change the batteries ( Y page 269).I Key not detected
The KEYLESS GO key* is not in the vehicle.
It will no longer be possible to centrally
lock

the vehicle and start the engine if the
engine is switched off. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Look for the KEYLESS GO key*. I Key not detected
The KEYLESS GO * key is not detected
while

the engine is running, because there
is interference from a strong source of
radio waves. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Operate the vehicle using the key in the ignition
lock if necessary. Practical advice
* optional
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Troubleshooting
246 Problem Possible cause/consequence Suggested solutions
l
The red distance warning
lamp* lights up while the
vehicle is in motion. You
will also hear a warning
tone. G
Risk of accident
You are approaching a vehicle in
front at too great a speed or Dis-
tronic*
has detected a stationary
obstacle in your line of travel. X
Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to brake
or take evasive action. D
The red coolant warning
lamp comes on while the
engine is running. There is insufficient coolant in the
expansion tank.
The coolant is too hot and the
engine is no longer being cooled
sufficiently. X
Stop the vehicle as soon as possible. Pay attention to the traffic
conditions as you do so.
X Allow the engine and coolant to cool.
X Check the coolant level. Observe the warning notes
(Y page 196). Top up the coolant if necessary.
X Have the coolant system checked at a qualified specialist work-
shop if the coolant needs topping up more often than usual. D
The red coolant warning
lamp comes on while the
engine is running. If the coolant level is correct, the
radiator fan may be faulty.
The coolant is too hot and the
engine is no longer being cooled
sufficiently. X
If the coolant temperature is less than 120†, you can continue
driving to the nearest qualified specialist workshop.
X In doing so, avoid heavy loads on the engine (e.g. driving in moun-
tainous terrain) and stop-and-go driving. Practical advice
* optional
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