2007 MERCEDES-BENZ C-CLASS SALOON key

Troubleshooting
29
6 Key
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock th
e
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 300).
X Check the key batteries (Y page 304) and replace them if neces-
sary (Y page 304). The key is faulty. X
Lock or unlock the vehicle using the emergency key element
(Y page 300).
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 304). 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
204_AKB; 2; 3, en-GB
mkalafa
, 2007-06-26T23:11:51+02:00 - Seite 296

Troubleshooting
29
7 Problem Possible cause/consequence Suggested solutions
The engine cannot be started
using the key. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating* or interio r
lighting, and try to start the engine again.
If this does not work :
X Check the starter battery and recharge it if necessary
(Y page 326).
or
X Jump-start the vehicle (Y page 328).
or
X Consult a qualified specialist workshop. The engine cannot be started
using the key. The steering lock is mechanically
blocked. X
Remove the key and reinsert it into the ignition lock. At the sam e
time, turn the steering wheel in both directions. Practical advice
* optional
204_AKB; 2; 3, en-G
B
mkalafa , 2007-06-26T23:11:51+02:00 - Seite 297

Troubleshooting
29
8 KEYLESS GO*
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock th
e
vehicle using the KEYLESS GO
key. The KEYLESS GO key batterie
s
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 300).
X Check the KEYLESS GO key batteries (Y page 304) and replace
them if necessary (Y page 304). 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 300). 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 304). Practical advice
* optional
204_AKB; 2; 3, en-GB
mkalafa,
2007-06-26T23:11:51+02:00 - Seite 298

Troubleshooting
29
9 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 brak
e
when starting the engine. X
Depress the brake pedal 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. Parking up the vehicle
Proble
m 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 326). Practical advice
204_AKB; 2; 3, en-GB
mkalafa,
2007-06-26T23:11:51+02:00 - Seite 299

Locking/unlocking in an emergency
300 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 71).
There are several ways to turn off the alarm:
X Press the korj button on the key.
or
X Insert the key into the ignition lock.
or
X Press the KEYLESS GO but-
ton* (Y page 85).
or
X Lock or unlock the vehicle using KEYLESS
GO*.
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key in the ignition lock. Releasing and removing the emergenc
y
key element 1
Release catch
2 Emergency key element
X Push release catch 1in the direction of
the arrow and at the same time remove
emergency key element 2from 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 300). $
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
204_AKB; 2; 3, en-GB
mkalafa,
2007-06-26T23:11:51+02:00 - Seite 300

Locking/unlocking in an emergency
301Locking 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/tailgate.
X Press the central locking button
(Y page 80).
X Check whether the locking knobs on th e
doors are still visible. Press the locking
knobs down by hand if necessary.
X Remove the emergency key element from
the key (Y page 300). $
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/
tailgate are locked. Opening 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 th e
key or the KEYLESS GO key *:
X Remove the emergency key element from
the key (Y page 300). Boot lock
$ Basic position
% Unlocking 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
% .
The boot is unlocked.
X Turn the emergency key element back to
basic position $and remove it. Practical advice
* optional
204_AKB; 2; 3, en-GB
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Locking/unlocking in an emergency
302 Opening the tailgate
If the tailgate cannot be opened, use th e
emergency release on the inside of the tail-
gate.
X Take the emergency key element out of the
key (Y page 300). 1
Opening in trim
2 Emergency key element
! The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and
behind the tailgate .
X Insert emergency key element 2into
opening in trim 1. X
Turn emergency key element 290° clock-
wise.
X Push emergency key element 2in the
direction of arrow and open the tailgate. Emergency fuel filler flap release
G
Risk of injury
The corners of the vehicle walls may be
sharp-edged. You could injure yoursel f
while carrying out an emergency release of
the fuel filler flap. Avoid contact with th e
edges of the vehicle walls.
The emergency release is located in the
boot/luggage compartment, behind the fuse
box on the right-hand side when viewed in the
direction of travel.
X Open the tailgate/boot lid.
X Open the fuse box in the boot/luggage
compartment (Y page 334). 1
Release cord (example illustration from a
Saloon)
X Pull release cord 1.
The fuel filler flap is unlocked.
X Open the fuel filler flap. Practical advice
204_AKB; 2; 3, en-GB
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2007-06-26T23:11:51+02:00 - Seite 302

Changing the batteries
3041
To fold back
2 To push back
3 To push down
X Push the head restraint cushion backwards
by the lower part as far as it will go 2.
X Push the head restraint cushion down into
the guide as far as it will go 3.
X Firmly press back the head restraint cush -
ion until it engages 1. Changing the batteries
Notes
It is advisable to have the batteries replaced
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre. G
Risk of poisoning
Batteries contain toxic and caustic sub-
stances. For this reason, keep batteries
away from children.
If a battery is swallowed, consult a docto r
immediately. H
Environmental not
e
Do not dispose of batteries with the house-
hold rubbish. They contain highly toxic sub-
stances .
Take discharged batteries to a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre, or to a special collection
point for old batteries. Key or KEYLESS GO key*
Checking the batteries X
Press the jork button.
The batteries are in order if the battery
charge indicator lamp goes on briefly.
Changing the batteries You require two CR 2025 3V cell batteries.
X
Remove the emergency key element from
the key (Y page 300). 1
Emergency key element
2 Battery tray Practical advic
e
* optional
204_AKB; 2; 3, en-GB
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