2012 MERCEDES-BENZ E-CLASS ESTATE ECU

Immediately rinse acid
splashes off with clean
water. Consul
tadoctor if
necessary. Wear eye protection.
Keep children away.
Observe this Owner's Man-
ual.
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.T hese 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. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
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.
! Have the battery checked regularly at a
qualified specialist workshop.
Observe the service intervals in the Service
Booklet or contact a qualified specialist
workshop for more information.
! You should have all work involving the
battery carried out at aqualified specialist
workshop. In the exceptional case that it is
necessary for you to disconnect the battery
yourself, make sure that:
R you switch off the engine and remove the
key. On vehicles with KEYLESS-GO,
ensure that the ignition is switched off.
Chec kthat all the indicator lamps in the
instrument cluster are off. Otherwise,
electronic components, such as the
alternator, may be damaged.
R you first remove the negative terminal
clamp and then the positive terminal
clamp. Never swap the terminal clamps.
Otherwise, the vehicle's electronic sys-
tem may be damaged.
R in vehicles with automatic transmission,
the transmission is locked in position P
after disconnecting the battery. The vehi-
cle is secured against rolling away.Y ou
can then no longer move the vehicle.
The battery and the cover of the positive
terminal clamp must be fitted securely dur-
ing operation. 368
Battery (vehicle)Breakdown assistance

Towing and tow-starting
Important safety notes
G
WARNING
Hybrid vehicles: it is imperative tha tyou read
the "HYBRID" supplement. Otherwise, you
may not recognise dangers. G
WARNING
If you tow the vehicle, you must use a rigid
towing bar if:
R the engine is not running.
R there is a brake system malfunction.
R there is a malfunction in the 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.
! Only secure the tow rope or towing bar to
the towing eyes. The vehicle may otherwise
be damaged.
! Observe the following points when towing
with a tow rope:
R secure the tow rope on the same side on
both vehicles.
R the tow rope must not be longer than is
legally permitted. It should be marked in
the middle, e.g. with a white cloth
(30 x30c m) so thatothe rroad users are
aware that a vehicle is being towed. R
the tow rope may only be attached to the
towing eyes.
R observe the brake lamps of the towing
vehicle while driving. Always maintain a
distance so that the tow rope does not
sag.
R do not use steel cables or chains to tow
your vehicle. The vehicle could be dam-
aged.
! Do not use the towing eye for recovery,
this could damage the vehicle. If in doubt,
recover the vehicle with acrane.
! 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-passenge rdoor which
could damage the transmission.
! 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.
! If you tow or tow-start another vehicle, its
weight must not exceed the maximu mper-
missible gross vehicle weight of your vehi-
cle.
Information on your vehicle's gross vehicle
weight rating can be found on the vehicle
identification plate (Y page 435).
Observe the legal requirement sfor the rele-
vant countries when towing and tow-starting.
It is better to have the vehicle transported
than to have it towed.
If the vehicle has suffered transmission dam-
age, have it transported on a transporter or
trailer.
When towing a vehicle with an automatic
transmission, the transmission must be in
position N. 372
Towing and tow-startingBreakdown assistance

Towing the vehicle with both axles on
the ground
G
WARNING
The powe rassistance for the steering and the
brake force booster do not work when the
engine is not running. You will then need
much more effort to brake and steer the vehi-
cle. Adapt your style of driving accordingly.
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 372).
The automatic transmission automatically
shifts to position Pwhen you open the driver's
or front-passenger door or when you remove
the key from the ignition lock. In order to
ensure that the automatic transmission stays
in position Nwhen towing the vehicle, you
must observe the following points:
X Make sure that the vehicle is stationary and
that the key is in position 0in the ignition
lock.
X Turn the key to position 2in the ignition
lock.
On vehicles with KEYLESS-GO, use the key
instead of the Start/Stop button
(Y page 161).
X Depress and hold the brake pedal.
X Shift the automatic transmission to posi-
tion N.
X Vehicles with manual transmission:
depress the clutch pedal.
X Engage neutral.
X Release the brake pedal.
X Release the parking brake.
X Switch on the hazard warning lamps
(Y page 129).
X Leave the key in position 2in the ignition
lock.
i When towing 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
! 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.
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:
engage first 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. 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 374
Towing and tow-startingBreakdown assistance

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 powert o the vehicle's
electrical system in the same way as when
jump-starting (Y page 370).
Have the vehicle transported on a transporter
or trailer. Tow-starting (emergency engine
starting)
! Vehicles with automatic transmission
must not be tow-started. The transmission
may otherwise be damaged.
When tow-starting, it is important that you
observe the safety instructions (Y page 372)
and the legal requirements in each respective
country.
X Switch on the hazard warning lamps
(Y page 129).
X Fit the towing eye (Y page 373).
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.
X Depress the clutch pedal and keep it
depressed.
X Engage neutral.
X Release the brake pedal.
X Tow-start the vehicle.
X Engage second gear.
X Release the clutch pedal slowly; do not
depress the accelerator pedal while doing
so.
The engine is started.
X Depress the clutch pedal and shift to neu-
tral.
X Stop at a suitable place.
X Depress the parking brake.
X Remove the rigid towing bar or towing rope. X
Remove the towing eye (Y page 373).
X Switch off the hazard warning lamps.
Before tow-starting the following conditions
must be fulfilled:
R the battery is connected.
R the engine has cooled down.
R the exhaust system has cooled down.
You can find information on "Jump-starting"
at (Y page 370). Electrical fuses
Important safety notes
G
WARNING
Only use fuses that have been approved for
Mercedes-Benz vehicles and which have the
correct fuse rating for the systems con-
cerned. Do not attempt to repair or bridge
faulty fuses. Using fuses which have not been
approved or attempting to repair or bridge
faulty fuses could cause the fuse to be over-
loaded and result in a fire. Have the cause
traced and rectified at a qualified specialist
workshop.
! Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correc tfuse rating for the system
concerned. Otherwise, components or sys-
tems could be damaged.
The fuses in your vehicle serve to close down
faulty circuits. If afuse blows, all the compo-
nents on the circuit and their functions stop
operating.
Blown fuses must be replace dwith fuses of
the same rating, which you can recognise by
the colour and fuse rating. The fuse ratings
are listed in the fuse allocation chart.
If the newly inserted fuse also blows, have the
cause traced and rectified at a qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre. Electrical fuses
375Breakdown assistance Z

Before replacing a fuse
X Secure the vehicle against rolling away
(Y page 183).
X Switch off all electrical consumers.
X Turn the key to position 0in the ignition
lock and remove it (Y page 161).
or
X On vehicles with KEYLESS-GO, make sure
the ignition is switched off (Y page 161).
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
R fuse bo xinthe engine compartmentont he
left-hand side of the vehicle, when viewed
in the direction of travel
R fuse box in the boot/luggage compartment
on the right-hand side of the vehicle, when
viewed in the direction of travel
The fuse allocation chart is located in the
vehicle tool kit in the stowage compartment
under the boot/luggage compartmentf loor
(Y page 361). Fuse box in the engine compartment
G
WARNING
Make sure that the windscreen wipers are
turned off and the key is pulled out of the igni-
tion lock before you open the cover of the fuse
box. Otherwise, the windscreen wipers and
the wiper rods above the cover could be set
in motion. This could lead to you or others
being injured by the wiper rods.
! Make sure that no moisture can enter the
fuse box when the cover is open.
! When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
seeping in or dirt could otherwise impair
the operation of the fuses.
X Make sure that the windscreen wipers are
switched off.
X Open the bonnet. X
Remove any existing moisture fro mthe
fuse box using a dry cloth.
X To open: take lines ;from the guides.
X Move aside lines ;.Route the lines behind
connection =to do this.
X Open clamps :.
X Remove the fuse box cover forwards.
X To close: check whether the rubber seal is
lying correctly in the cover.
X Insert the cover at the rear of the fuse box
into the retainer.
X Fold down cover and close clamps :.
X Secure lines ;in the guides.
X Close the bonnet. Fuse box in the boot
! Make sure that no moisture can enter the
fuse box when the cover is open.
! When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
seeping in or dirt could otherwise impair
the operation of the fuses.
X Open the boot lid. 376
Electrical fusesBreakdown assistance

Clean the contact surface
softhe wheel and
the brake disc thoroughly every time a wheel
is interchanged. Check the tyre pressure and,
if necessary, restart the tyre pressure loss
warning system or the tyre pressure monitor. Direction of rotation
Tyres with a specified direction of rotation
have additional benefits, e.g. if there is a risk
of aquaplaning. You will only gain these ben-
efits if the correct direction of rotation is
observed.
An arrow on the sidewall of the tyre indicates
its correct direction of rotation. Storing wheels
Store wheels that are not being used in a cool,
dry and preferably dark place. Protect the
tyres against oil, grease, petrol and diesel. Cleaning the wheels
G
WARNING
The water jet of circular-jet nozzles (dirt grind-
ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponents damaged in this way can unexpect-
edly fail. There is a risk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam-
aged tyres or chassis components replaced
immediately. Fitting
awheel
Preparing the vehicle X
Stop the vehicle on solid, non-slippery and
level ground.
X Apply the parking brake.
X Bring the front wheels into the straight-
ahead position.
X Shift the transmission to position P.X
Vehicles with AIRMATIC :make sure that
"normal" level is selected (Y page 208).
X Switch off the engine.
X Vehicles without KEYLESS-GO: remove
the key from the ignition lock.
X Vehicles with KEYLESS-GO: open the
driver's door.
The on-board electronics have status 0,
which is the same as the key having been
removed.
X Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(Y page 161).
X If included in the vehicle equipment,
remove the tyre-change tool kit from the
vehicle.
X Secure the vehicle to preven titfrom rolling
away.
i Apart from certain country-specific varia-
tions, the vehicles are not equipped with a
tyre-change tool kit. Some tools for chang-
ing a wheel are specific to the vehicle. For
more information on which tools are
required to perform a wheel change on your
vehicle, consult a qualified specialist work-
shop.
Necessary wheel-changing tools can
include, for example:
R jack
R wheel chock
R wheel wrench
Securing the vehicle agains trolling
away Changing
awheel
389Wheels and tyres Z

If yourv
ehicle is equipped with a wheel chock,
it can be found in the tyre-change tool kit
(Y page 361).
The folding wheel choc kis an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
X Fold both plates upwards :.
X Fold out lower plate ;.
X Guide the lugs on the lower plate fully into
the openings in base plate =.Securing the vehicle on level ground (example:
Saloon)
X
On level ground: place chocks or other
suitable items under the front and rear of
the wheel that is diagonally opposite the
wheel you wish to change. Securing the vehicle on slight downhill gradients
(example: Saloon)
X On light downhill gradients: place
chocks or other suitable items in front of
the wheels of the front and rear axle. Raising the vehicle G
WARNING
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the
jack could tip over with the vehicle raised.
There is a risk of injury.
Only position the jack at the appropriate jack-
ing point of the vehicle. The base of the jack
must be positioned vertically, directly under
the jacking point of the vehicle.
The following must be observed when raising
the vehicle:
R to raise the vehicle, only use the vehicle-
specific jack that has been tested and
approved by Mercedes-Benz. If the jack is
used incorrectly, it could tip over while the
vehicle is raised.
R the jack is designed only to raise and hold
the vehicle for a short time while a wheel
is being changed. It is not suited for per-
forming maintenance work under the vehi-
cle.
R avoid changing the wheel on uphill and
downhill slopes.
R before raising the vehicle, secure it from
rolling away by applying the parking brake
and inserting wheel chocks. Never disen-
gage the parking brake while the vehicle is
raised.
R the jack must be placed on a firm, flat and
non-slip surface. On a loose surface, a
large, load-bearing underlay must be used.
On a slippery surface, a non-slip underlay
must be used, e.g. rubber mats.
R do not use wooden blocks or similar
objects as a jack underlay.O therwise, the
jac kw ill not be able to achieve its load-
bearing capacity due to the restricted
height.
R make sure that the distance between the
underside of the tyres and the ground does
not exceed 3 cm.
R never place your hands or feet under the
raised vehicle. 390
Changing
awheelWheels and tyres