MERCEDES-BENZ CLS COUPE 2008 Owners Manual

Troubleshooting
258 Parktronic*
Problem Possible cause/consequence Suggested solutions
Only the red segments in the
Parktronic
warning display are lit.
You also hear a warning tone for
approximately two seconds.
Parktronic is deactivated after
approximately 20 seconds and
the indicator lamp in the Park-
tronic button lights up. Parktronic has malfunctioned
and has switched itself off. X
If problems persist, have Parktronic checked at a qualified spe-
cialist workshop. Only the red segments in the
Parktronic

warning display are lit.
Parktronic is deactivated after
approximately 20 seconds. The Parktronic sensors are dirty
or there is interference. X
Clean the Parktronic sensors ( Y page 214).
X Switch the ignition back on. Only the red segments in the
Parktronic

warning display are lit.
Parktronic is deactivated after
approximately 20 seconds. The problem may be caused by an
external source of radio or ultra-
sound waves. X
See if Parktronic functions in a different location. Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 258

Troubleshooting
259Headlamps and turn signals
Problem Possible cause/consequence Suggested solutions
The headlamps or the turn signals
in
the exterior mirrors are misted
up on the inside. Air humidity is very high. X
Drive with the headlamps switched on.
The headlamps are demisted after a short distance. The headlamp housing is not
sealed and moisture has been
able to enter. X
Have the headlamps checked at a qualified specialist workshop. Windscreen wipers
Problem Possible cause/consequence Suggested solutions
The windscreen wipers are jam-
med. Leaves or snow, for example, may
be obstructing the windscreen
wiper movement. The wiper
motor has been deactivated. X
For safety reasons, you should remove the key from the ignition
lock.
X Remove the cause of the obstruction.
X Switch the windscreen wipers back on. The windscreen wipers fail com-
pletely. The windscreen wiper drive is
malfunctioning. X
Select another wiper speed on the combination switch.
X Have the windscreen wipers checked at a qualified specialist work-
shop. Practical advice
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 259

Troubleshooting
260 Windows
Problem Possible cause/consequence Suggested solutions
A side window will not close. An object is blocking the side win-
dow and preventing it from clos-
ing. X
Remove the object(s).
X Close the side window. You cannot see the cause. X
Close the side window with increased force or without the anti-
entrapment feature ( Y page 99).Mirrors
Problem Possible cause/consequence Suggested solutions
An exterior mirror has been
pushed out of position. Vehicles with exterior mirrors that cannot be folded in/out electri-
cally:
X
Push the mirror into the correct position manually.
Vehicles with electrically folding exterior mirrors*:
X Press the mirror-folding button* ( Y page 84) repeatedly until you
hear a distinct click.
The
mirror housing is engaged again and you can adjust the mirror
as usual (Y page 84). Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 260

Troubleshooting
261Key
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock the
vehicle using the key. The key batteries are discharged
or nearly discharged. X
Point the tip of the key at the driver's door handle from close range
and try to open the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 266).
X Check the key batteries (Y page 270) and replace them if neces-
sary ( Y page 270). The key is faulty. X
Lock or unlock the vehicle using the emergency key element
(Y page 266).
X Have the key checked at a qualified specialist workshop. The battery charge indicator lamp
of the key does not go on during
the test. The key batteries are discharged. X
Change the batteries ( Y page 270).You have lost a key. X
Have the key cancelled at a Mercedes-Benz Service Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. You have lost the emergency key
element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. Practical advice
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 261 Z

Troubleshooting
262 Problem Possible cause/consequence Suggested solutions
The key cannot be turned in the
ignition lock. The key has been in position
0 for
a considerable time. X
Remove the key and reinsert it into the ignition lock.
X Check the starter battery and recharge it if necessary
(Y page 290).
X Start the engine. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating* or interior
lighting, and try to turn the key again.
If this does not work:
X Check the starter battery and recharge it if necessary
(Y page 290).
or
X Jump-start the vehicle (Y page 291).
or
X Consult a qualified specialist workshop. Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 262

Troubleshooting
263KEYLESS GO*
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock the
vehicle using the KEYLESS GO
key. The KEYLESS GO key batteries
are discharged or nearly dis-
charged. X
Lock or unlock the vehicle using the remote control function of the
key.
Point the tip of the key at the driver's door handle from close
range and try to open the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 266).
X Check the KEYLESS GO key batteries (Y page 270) and replace
them if necessary (Y page 270). There is a fault with KEYLESS GO. X
Lock or unlock the vehicle using the remote control function of the
key.

To do this, point the tip of the key at the driver's door handle
from close range and try to open the vehicle again.
X Have the KEYLESS GO key checked at a qualified specialist work-
shop. There is interference from a pow-
erful source of radio waves. X
Lock or unlock the vehicle using the emergency key element
(Y page 266). The battery check lamp in the
KEYLESS GO key does not light
up when tested. The KEYLESS GO key batteries
are discharged. X
Change the batteries ( Y page 270). Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 263 Z

Troubleshooting
264 Problem Possible cause/consequence Suggested solutions
The vehicle cannot be started
using the KEYLESS GO key and
the
KEYLESS GO button. The KEY-
LESS GO key is in the vehicle. A door is open. The key therefore
cannot be detected so easily. X
Close the door and try to start the vehicle again. You did not depress the brake
when starting the engine. X
Depress the brake and press the KEYLESS GO button. There is interference from a pow-
erful source of radio waves. X
Start your vehicle using the KEYLESS GO key in the ignition lock. You have lost the KEYLESS GO
key. X
Have the KEYLESS GO key cancelled at a Mercedes-Benz Service
Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. Auxiliary heating/ventilation*
Problem Possible cause/consequence Suggested solutions
The auxiliary heating is not work-
ing. The fuel level is down to the
reserve level. X
Refuel at the nearest filling station. The battery is not sufficiently
charged. X
Charge the battery. The auxiliary heating is faulty. X
Have the auxiliary heating checked at a qualified specialist work-
shop. Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 264

Troubleshooting
265Problem Possible cause/consequence Suggested solutions
The auxiliary heating cannot be
switched on or off using the
remote control. The remote control display shows
FAIL and the
¢ symbol.
The signal transmission between
the remote control and the vehi-
cle is faulty. X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off using
the remote control. The remote control display shows
FAIL and the
¡ symbol.
There is not enough fuel in the
tank, or the auxiliary heating is
faulty. X
Refuel at the nearest filling station.
X Have the auxiliary heating checked at a qualified specialist work-
shop. Parking up the vehicle
Problem Possible cause/consequence Suggested solutions
The vehicle is to be left parked up
for longer than six weeks. X
Visit a qualified specialist workshop and seek advice.
X Disconnect the battery ( Y page 290). Practical advice
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 265

Locking/unlocking in an emergency
266 Locking/unlocking in an emergency
Emergency key
If the vehicle can no longer be unlocked or
locked with the key or the KEYLESS GO
key*, use the emergency key element.
If you use the emergency key element to
unlock and open the driver's door or the boot
lid, the anti-theft alarm system* will be trig-
gered ( Y page 61).
There are several ways to turn off the alarm:
X Press the k or j button on the key.
or
X Insert the key into the ignition lock.
or
X Press the KEYLESS GO but-
ton* ( Y page 74).
or
X Lock or unlock the vehicle using KEYLESS
GO*. Releasing and removing the emergency
key element 1
Release catch
2 Emergency key element
X Push release catch 1 in the direction of
the arrow and at the same time remove
emergency key element 2 from the key. Unlocking the vehicle
If the vehicle can no longer be unlocked cen-
trally with the key or the KEYLESS GO key*:
X Remove the emergency key element from
the key (Y page 266). $
To unlock
X Insert the emergency key element fully into
the lock of the driver's door.
X Turn the emergency key element anti-
clockwise to position $.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it. Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 266

Locking/unlocking in an emergency
267Locking the vehicle
If the vehicle can no longer be locked cen-
trally with the key or the KEYLESS GO key*:
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the boot lid.
X Press the central locking button
(Y page 70).
X Check whether the locking knobs on the
doors are still visible. Press the locking
knobs down by hand if necessary.
X Remove the emergency key element from
the key (Y page 266).$ To lock X
Insert the emergency key element fully into
the lock of the driver's door.
X Turn the emergency key element clockwise
as far as it will go to position $.
i On right-hand-drive vehicles, turn the
emergency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Check whether the doors and the boot lid
are locked.
Opening the boot
To unlock the boot
! The boot lid swings upwards when
opened. Therefore, make sure that there is
enough space above the boot lid.
If the boot can no longer be unlocked with the
key or the KEYLESS GO key*:
X Remove the emergency key element from
the key (Y page 266).
Boot lock
$ To unlock the boot
X Insert the emergency key element fully into
the boot lock.
X Turn the emergency key element anti-
clockwise as far as it will go to position
$ and pull the boot lid handle.
The boot is unlocked.
X Turn the emergency key element back and
remove it.
Practical advice
* optional
219_AKB; 2; 4, en-GB
mkalafa,
2007-11-13T09:28:36+01:00 - Seite 267