2007 MERCEDES-BENZ C-CLASS SALOON battery

Trailer towing*
22
5 Trailer power suppl
y
When delivered from the factory, your vehi-
cle's trailer socket outlet is equipped with a
permanent power supply and a power supply
that is switched on via the ignition lock .
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10.
! You can connect consumers with a power
rating of up to 240 W to the permanen t
power supply and up to 180 W to the power
supply that is switched on via the ignition
lock .
You must not charge a trailer battery using
the power supply.
You can obtain further information about
installing the trailer electrics from a qualified
specialist workshop, e.g. a Mercedes-Ben z
Service Centre.
X To switch the switched power supply on
or off: turn the key in the ignition lock to
position 2or 0, respectively. Trailer with 7-pin connector
If your trailer has a 7-pin connector, you can
connect it to the 13-pin socket on the ball
coupling using an adapter or, if necessary, an
adapter cable. Both of these can be obtained
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre.
Fitting the adapter 1
Connector with lug
2 Socket with groove
X Open the socket cover.
X Insert the connector with lug 1into
groove 2on the socket and turn the con-
nector clockwise to the stop.
X Make the cover engage. X
If you are using an adapter cable, secure
the cable to the trailer with cable ties.
! Make sure that there is sufficient cable
play so that the cable cannot become
detached when cornering. Operation
* optional
204_AKB; 2; 3, en-GB
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Service
226 Service
Active Service System
ASSYST PLUS, the Active Service System,
tells you when the next service is due.
Services that are due appear in the multi-
function display:
Next service A in ... days
Next service A in ... km
Service A due Service message in a vehicle with a luxury multi-
function steering wheel*
The letter indicates which service must be
carried out. Astands for a minor service and
B for a major service. A number or another
letter may be displayed after the letter. This
figure indicates any necessary additiona l
maintenance work to be performed. If you
report this displayed information to a quali-
fied specialist workshop, for example aMercedes-Benz Service Centre, they can
inform you of the costs the service will incur.
ASSYST PLUS does not record any periods of
time during which the battery is disconnec-
ted. In order to maintain the time-dependent
service schedule, you should call up the
service due date and make a note of it befor
e
you disconnect the battery. The other option
is to subtract the battery-disconnection peri-
ods from the service date shown on the dis-
play.
Fading out the service message X
Multi-function steering wheel (4 but-
tons) :press í.
X Luxury multi-function steering wheel*
(12 buttons): pressL.
or
X Press the #button.
Missing the service due dat e One of the following messages, for example,
will appear in the multi-function display:
Service A overdue by ... days
Service A overdue by ... kmA qualified specialist workshop, e.g.
a
Mercedes-Benz Service Centre, will reset the
service indicator after the necessary service
work has been carried out.
i If you fail to have the service performed
by the specified date, you may be contra-
vening the relevant laws, your warranty
may be invalidated and ex gratia claims and
MobiloLife services may be refused .
Calling up the service due date Multi-function steering wheel (4 buttons)
X
Switch on the ignition.
X Select the ASSYST PLUS menu by pressing
è .
Vehicles with a luxury multi-function
steering wheel* (12 buttons)
X Switch on the ignition.
X Press (or& to select the Service
menu.
X Press $or% to select the ASSYST
PLU Ssubmenu and confirm with #.
The service due date appears in the display .Operation
* optional
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231
Where will I find...?
...........................232
Display messages ............................. 236
Troubleshooting ................................ 276
Locking/unlocking in an emer-
gency ................................................. 300
Resetting triggered NECK-PRO
head restraints .................................. 303
Changing the batteries .....................304
Changing the bulbs ...........................305
Replacing the wiper blades ..............312
Flat tyre ............................................. 313
Battery ............................................... 324
Jump-starting .................................... 328
Towing and tow-starting ..................329
Fuses .................................................. 332 Practical advice
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Display
messages 24
1 Display messages Possible cause/consequence Possible solution
ESP inoperative ESP currently
unavail. See Own
-
er's Manual ESP
®
, BAS, PRE–SAFE ®
*, hill start assist
and ESP ®
trailer stabilisation are unavail -
able due to undervoltage. It is possible
that the battery is not being charged. The
v warning lamp also lights up in th e
instrument cluster. The brake system con -
tinues to function normally, but without
the functions listed above . X
Drive on carefully.
X Visit a qualified specialist workshop. ESP inoperative ESP currently
unavail. See Own-
er's Manual If this display message appears and the
v
warning lamp flashes at the same
time, this means that ETS has been deac-
tivated to prevent the brakes on the driv e
wheels from overheating . ETS switches on again as soon as the brakes have
cooled down. The display message disappears
and the
vwarning lamp goes out. Trailer hitch
Check loc
k
mech. The trailer tow hitch* is not correctly
engaged. A warning tone also sounds. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Allow the ball coupling to engage in the end
position (Y page 220). Practical advice
* optional
204_AKB; 2; 3, en-GB
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Display
messages 24
9 Display messages Possible cause/consequence Possible solution
- ABS and ESP inoper-
ative See Owner's
Manual
G
Risk of accident
ABS, ESP ®
, BAS, PRE–SAFE ®
*, hill start
assist and ESP ®
trailer stabilisation ar e
unavailable due to a malfunction. The
v warning lamp also lights up in th e
instrument cluster.
The brake system continues to function
normally, but without the functions listed
above. X
Drive on carefully.
X Visit a qualified specialist workshop. \ Trailer tow hitch
Check lock mecha-
nism
The trailer tow hitch* is not correctly
engaged. A warning tone also sounds. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Allow the ball coupling to engage in the end
position (Y page 220). # The battery is not being charged. Possible
causes:
R
faulty alternator
R torn poly-V-bel t
R malfunction in the electronics X
Stop immediately and safely when traffic con-
ditions allow and check the poly-V-belt.
X If it has torn: do not drive on. Contact th e
nearest qualified specialist workshop .
X If it is not damaged :have the vehicle checked
as soon as possible at a qualified specialist
workshop. Practical advice
* optional
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Troubleshooting
29
0 Engine
Problem Possible cause/consequence Suggested solutions
The engine will not start. You can
hear the starter motor operating. R
There may be a malfunction in
the engine electronics.
R There may be a malfunction in
the fuel supply. X
Turn the key back to position 0in the ignition lock before the nex t
starting attempt.
X Try to start the engine again (Y page 113). When doing so, remem-
ber that excessively long and frequent attempts to start the engin e
will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. Vehicles with a diesel engine:
The engine will not start. You can
hear the starter motor operating
.
The reserve fuel warning lamp is
on and the fuel gauge shows 0. The fuel tank has been run dry. X
Refuel the vehicle.
X Bleed the fuel system (Y page 289). The engine will not start. You can-
not hear the starter motor oper-
ating. The on-board voltage is too low
because the starter battery is too
weak or discharged. X
Jump-start the vehicle (Y page 328).
If the engine does not start despite attempting to jump-start it:
X Consult a qualified specialist workshop. Practical advice
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0

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
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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
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