key battery MERCEDES-BENZ E-CLASS SALOON 2011 Owner's Manual

X
Grasp release wheel ;with your hand
such that the thumb is in the thumb rest
and turn it anti-clockwise.
The ball coupling unlocks and lowers. Indi-
cator lamp :flashes. X
Press the ball coupling in the direction of
the arrow until it engages behind the
bumper.
Indicato rlamp :goes out and the mes-
sage in the multifunction display disap-
pears. Trailer power supply
When it leaves the factory, your vehicle's
trailer socke tis 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 accessories with a
power rating of up to 240 W to the perma-
nent power supply and with a power rating
of up to 180 W to the power supply that is
switched on via the ignition lock.
The trailer battery may not be charged from
the power supply.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can find more information abouti nstal-
ling the trailer electrics at a qualified special-
is tw orkshop.
X To switch the connected power supply
on or off: turn the key in the ignition lock
to position 2or 0respectively. Bulb failure indicator for LED lamps
i If LED lamps are fitted in the trailer, an
error message may appear in the multi-
function display even if there is no fault. The
reason for the error message may be that
the current has fallen below the minimum
of 50 mA.
To ensure reliable operation of the bulb failure
indicator, each LED chain in the trailer lighting
must be guaranteed a minimum current of
50 mA. Trailer with 7-pin connector
General notes 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 can be obtained in a
qualified specialist workshop.226
Towing
atrailerDriving an d parking

X
To open: slide cover :forwards until it
engages.
X To remove the insert: hold insert=by
the ribbing at the sides and lift it up ;and
out.
X To refi tthe insert: press insert =into the
holder until it engages.
X To close: press cover :briefly at the
front.
The cover moves back.
Ashtray in the rear-compartment centre
console X
To open: briefly press cover ;at the top.
The ashtray opens.
X To remove the insert: press release but-
ton =and lift the insert up and out.
X To fit the insert: fit insert:from above
into the holder and press dow ninto the
holde runtil it engages. Cigarette lighter
G
WARNING
Only hold the hot cigarette lighte rby its knob.
Otherwise, you might burn yourself.
Make sure that children travelling in the vehi-
cle are no table to injure themselves on the
hot cigarette lighter or cause a fire with it. X
Turn the key to position 2in the ignition
lock.
X To open: slide cover :forwards until it
engages.
X Press in cigarette lighter ;.
Cigarette lighter ;will pop out automati-
cally when the heating element is red-hot.
X To close: press cover :briefly at the
front.
The cover moves back. 12
Vsockets
Points to observe before use The sockets can be used for accessories with
a maximum draw of 180 W (15 A). Accesso-
ries include such items as lamps or chargers
for mobile phones.
If you use the sockets for long periods when
the engine is switched off
,the battery may
discharge.
X Turn the key to position 1in the ignition
lock. Features
311Stowing and features Z

environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
G
WARNING
For safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz .These batteries provide
increased impact protection to prevent vehi-
cle occupants from suffering acid burns
should the battery be damaged in the event
of an accident.
To prevent acid burns, observe the following
safety notes when handling batteries:
R do not lean over the battery.
R do not place any metal objects on a battery.
Otherwise, you could cause a short circuit
and the battery's gas mixture could ignite.
R make sure that you do not create an elec-
trostatic charge, e.g. by wearing synthetic
clothing or as a result of friction on fabrics.
Therefore, you should not pull or slide the
battery over carpets or other synthetic
materials.
R never touch the battery first. To discharge
a possible electrostatic charge, step out of
the vehicle first and touch the bodywork.
R do not wipe the battery using a cloth. The
battery may explode as a result of electro-
static charge or due to flying sparks.
! Switch off the engine and remove the key
before disconnecting the terminal clamps
from the battery. On vehicles with KEY-
LESS-GO, make sure that the ignition is
switched off. Check that all the indicator
lamps in the instrumentc luster are off.You
may otherwise destroy electronic compo-
nents, such as the alternator. i
When you park the vehicle, remove the
key if you do not require any electrical con-
sumers. The vehicle will then use very little
energy, thus conserving battery power.
Mercedes-Benz recommends that you do not
carry out work on batteries yourself, e.g.
removing or charging. Have this work per-
formed at a qualified specialist workshop. Installation location of the battery
Your vehicle is equipped with a battery in the
engine compartment.Iti s located on the front
bulkhead under the filter box on the right-
hand side of the vehicle when viewed in the
direction of travel.
X Apply the parking brake firmly and, on vehi-
cles with automatic transmission, shift the
transmission to position P.
X Switch off all electrical consumers (e.g.
radio, blower, etc.).
X Turn the key to position 0(Ypage 155) in
the ignition lock and remove it, or, on vehi-
cles with KEYLESS-GO, make sure that the
ignition has been switched off
(Y page 155). All indicator lamps in the
instrument cluster must be off.
X Open the bonnet (Y page 321). X
Release clamps ;on filter box :using a
suitable object, such as a screwdriver.
X Remove filter box :. Battery
351Breakdown assistance Z

R
the engine is not running.
R there is a brake syste mmalfunction.
R there is a malfunctio ninthe power supply
or the vehicle's electrical system.
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will need more
force to steer and brake, you may have to
depress the brake pedal with maximum force.
Before towing away, make sure that the steer-
ing can be moved and is not locked.
If you tow or tow-start another vehicle, its
weight must not exceed the maximum per-
missible gross vehicle weight of your vehicle. G
WARNING
The vehicle is braked when the HOLD function
or DISTRONIC PLUS is activated. Therefore,
deactivate HOLD and DISTRONIC PLUS if the
vehicle is to be towed.
It is better to have the vehicle transported
than to have it towed.
! You may tow the vehicle for a maximum
of 50km. A towing speed of 50 km/h must
not be exceeded.
For towing distances over 50 km, the entire
vehicle must be lifted up and transported.
! Only secure the tow rope or towing bar to
the towing eyes. The vehicle may otherwise
be damaged.
! Do not use the towing eye for recovery,
as this could damage the vehicle. If in
doubt, recover the vehicle with a crane.
! Pull away smoothly when towing away or
tow-starting a vehicle. If the tractive power
is too high, the vehicles could be damaged.
! To tow vehicles with KEYLESS-GO, use
the key instead of the Start/Stop button.
The automatic transmission may otherwise
switch to position Pwhen you open the
driver's or front-passenger door which
could damage the transmission. When towing a vehicle with an automatic
transmission, the transmission must be in
position
N.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the key in the ignition lock to
position 2
R cannot shift the transmission to position
N on vehicles with automatic transmission
Vehicles with automatic transmission:
release the selector lever lock manually to
move it out of position P(Y page 172).
i Before the vehicle is towed, switch off the
automatic locking feature (Y page 89). You
could otherwise be locked out when push-
ing or towing the vehicle.
Deactivate tow-away protection
(Y page 78) before the vehicle is towed. Fitting/removing the towing eye
Fitting the towing eye Vehicles with a trailer tow hitch: if you intend
to use the vehicle for towing, fold out the ball
coupling and connect the towbar to it
(Y page 223).
X Remove the towing eye from the vehicle
tool kit (Y page 337). G
WARNING
The exhaust tail pipe may be hot. You could
burn yourself if you touch the tail pipe. Be
particularly careful when removing the rear
cover.
The mountings for the removable towing eyes
are located in the bumpers. They are at the
front and at the rear, under the covers. 356
Towing and tow-startingBreakdown assistance

X
Switch on the hazard warning lamps
(Y page 125).
X Leave the key in position 2in the ignition
lock.
i Whe ntowing with the hazard warning
lamps switched on, use the combination
switch as usual to signal achange of direc-
tion. In this case, only the turn signals for
the desired direction flash. When the com-
bination switch is reset, the hazard warning
lamps start flashing again. Transporting the vehicle
The towing eyes or trailer tow hitch can be
used to pull the vehicle onto a trailer or trans-
porter if you wish to transport it.
X Vehicles with manual transmission:
shift to neutral.
X Vehicles with automatic transmission:
turn the key to position 2in the ignition
lock.
X Shift the automatic transmission to posi-
tion N.
As soon as the vehicle is loaded:
X Prevent the vehicle from rolling away by
applying the parking brake.
X Vehicles with manual transmission:
shift to first gear or reverse gear.
X Vehicles with automatic transmission:
shift the automatic transmission to posi-
tion P.
X Turn the key in the ignition lock to position
0and remove the key from the ignition
lock.
X Secure the vehicle.
! Only lash the vehicle down by the wheels
or wheel rims, not by parts of the vehicle
such as axle or steering components. Oth-
erwise, the vehicle could be damaged. Notes for 4MATIC vehicles
! Vehicles with 4MATIC must not be towed
with the front or rear axle raised; otherwise,
the transmission may be damaged.
If the vehicle has transmission damage or
damage to the front or rear axle, have it trans-
ported on a transporter or trailer.
In the event of damage to the electrical
system
If the battery is defective, the automatic
transmission will be locked in position P. To
shift the automatic transmission to position
N, you must provide power to the vehicle's
electrical system in the same way as when
jump-starting (Y page 354).
Have the vehicle transported on a transporter
or trailer. Tow-starting (emergency engine
starting)
When tow-starting, it is important that you
observe the safety instructions (Y page 355)
and the legal requirements in each respective
country.
! Vehicles with automatic transmission
must not be tow-started. The transmission
may otherwise be damaged.
You can find information on "Jump-starting"
at (Y page 354).
Before tow-starting the following conditions
must be fulfilled:
R the battery is connected.
R the engine has cooled down.
R the catalytic converters have cooled down.
X Switch on the hazard warning lamps
(Y page 125).
X Fit the towing eye (Y page 356).
X Secure the rigid towing bar or the towing
rope.
X Depress and hold the brake pedal.
X Turn the key to position 2in the ignition
lock. 358
Towing and tow-startingBreakdown assistance