ECU MERCEDES-BENZ CLA-CLASS 2013 Repair Manual

! If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes automati-
cally in certain situations. To prevent dam-
age to the vehicle, deactivate DISTRONIC
PLUS and the HOLD function in the follow-
ing or other similar situations:
R when towing the vehicle
R in the car wash
! Only secure the tow cable or tow bar to
the towing eyes or, if available, to the trailer
tow hitch. You could otherwise damage the
vehicle.
! Observe the following points when towing
with a tow rope:
R Secure the tow rope on the same side on
both vehicles.
R Make sure that the tow rope is not longer
than legally permitted. Mark the tow rope
in the middle, e.g. with a white cloth
(30 x 30 cm). This will make other road
users aware that a vehicle is being
towed.
R Only secure the tow cable to the towing
eyes or, if available, to the trailer tow
hitch.
R Observe the brake lamps of the towing
vehicle while driving. Always maintain a
distance a distance so that the tow rope
does not sag.
R Do not use steel cables or chains to tow
your vehicle. You could otherwise dam-
age the vehicle.
! Do not use the towing eyes for recovery
purposes 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.
! You may tow the vehicle for a maximum
of 50 km. A towing speed of 50 km/h must
not be exceeded.For towing distances over 50 km, the front
axle or the entire vehicle must be raised
and transported.
! Vehicles with automatic transmission
must not be tow-started. The transmission
may otherwise be damaged.
Observe the legal requirements for the rele-
vant countries when towing and tow-starting.
It is better to have the vehicle transported
than to have it towed.
Vehicles with automatic transmission:
when towing a vehicle, 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 vehicles with automatic transmission:
cannot shift the transmission to position N
i Deactivate the automatic locking feature
( Y page 223). You could otherwise be
locked out when pushing or towing the
vehicle.
Deactivate tow-away protection
( Y page 71) before the vehicle is towed.Towing and tow-starting309Breakdown assistanceZProCarManuals.com

Fitting/removing the towing eye
Fitting the towing eyeXRemove the towing eye from the stowage
space.
The towing eye is located with the vehicle
tool kit under the boot floor ( Y page 273).
Vehicles with a TIREFIT kit: the towing eye
is located under the tyre inflation compres-
sor.XPress the mark on cover : inwards in the
direction of the arrow.XRemove cover : from the opening.XScrew the towing eye in clockwise to the
stop and tighten it.
Vehicles with a trailer tow hitch do not have
a bracket for the screw-in towing eye at the
back. If you intend to use the vehicle for tow-
ing, fold out the ball coupling ( Y page 203)
and secure the towbar to it.
Removing the towing eye
XLoosen the towing eye and unscrew it.XPosition the top of cover : in the bumper
and press it in at the bottom until it
engages.XPlace the towing eye in the stowage well
under the boot floor ( Y page 273).XVehicles with a TIREFIT kit: replace the tyre
inflation compressor.
Towing the vehicle with the front axle
raised
! The ignition must be switched off if you
are towing the vehicle with the front axle
raised. Intervention by ESP ®
could other-
wise damage the brake system.
XTurn the key to position 2 in the ignition
lock.XWhen the vehicle is stationary, depress the
brake pedal and keep it depressed.XVehicles with manual transmission:
depress the clutch pedal fully and shift to
neutral.
or
XVehicles with automatic transmission:
shift the automatic transmission to posi-
tion P.XRelease the brake pedal.XRelease the electric parking brake.XDeactivate automatic locking
( Y page 223).XSwitch on the hazard warning lamps
( Y page 110).XTurn the key in the ignition lock to position
0 and leave the key in the ignition lock.
When towing your vehicle with the front axle
raised, it is important that you observe the
safety instructions ( Y page 308).
Towing the vehicle with both axles on
the ground
i In order to signal a change of direction
when towing with the hazard warning lamps
switched on, use the combination switch as
usual. In this case, only the turn signals for
the desired direction flash. When you reset
310Towing and tow-startingBreakdown assistance
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the combination switch, the hazard warn-
ing lamps start flashing again.
Vehicles with automatic transmission: the
automatic transmission automatically shifts
to position P when 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 posi-
tion N when towing the vehicle, you must
observe the following points:XMake sure that the vehicle is stationary.XTurn the key to position 2 in the ignition
lock.XDepress and hold the brake pedal.XShift the automatic transmission to posi-
tion N.
Vehicles with manual transmission:
XTurn the key to position 2 in the ignition
lock.XDepress and hold the brake pedal.XDepress the clutch pedal fully and shift to
neutral.
Vehicles with manual or automatic trans-
mission:
XLeave the key in position 2 in the ignition
lock.XRelease the brake pedal.XRelease the electric parking brake.XSwitch on the hazard warning lamps
( Y page 110).
It is important that you observe the safety
instructions when towing away your vehicle
( Y page 308).
Transporting the vehicle
! You may only secure the vehicle by the
wheels, not by parts of the vehicle such as
axle or steering components. Otherwise,
the vehicle could be damaged.
XVehicles with manual transmission:
depress the clutch pedal fully and shift to
neutral.XVehicles with automatic transmission:
turn the key to position 2 in the ignition
lock.XMove the transmission to position N.
As soon as the vehicle is loaded:
XPrevent the vehicle from rolling away by
applying the electric parking brake.XVehicles with manual transmission:
depress the clutch pedal fully and engage
first or reverse gear.XVehicles with automatic transmission:
shift the transmission to position P.XTurn the key to position 0 in the ignition
lock and remove it.XSecure 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.
Tow-starting (emergency engine
starting)
! Do not tow-start vehicles with automatic
transmission. You could otherwise damage
the automatic transmission.
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.
XSwitch on the hazard warning lamps
( Y page 110).XFit the towing eye ( Y page 310).XSecure the rigid towing bar or the towing
rope.XDepress and hold the brake pedal.XTurn the key to position 2 in the ignition
lock.Towing and tow-starting311Breakdown assistanceZProCarManuals.com

XDepress the clutch pedal fully and shift to
neutral.XRelease the brake pedal.XTow-start the vehicle.XDepress the clutch pedal fully and engage
second gear.XRelease the clutch pedal slowly without
depressing the accelerator pedal.
The engine is started.XDepress the clutch pedal fully and shift to
neutral.XStop at a suitable place.XSecure the vehicle by applying the electric
parking brake.XRemove the rigid towing bar or towing rope.XRemove the towing eye ( Y page 310).XSwitch off the hazard warning lamps.
When tow-starting, it is important that you
observe the safety notes (Y page 308) and the
legal requirements in each respective coun-
try.
Electrical fuses
Important safety notes
GWARNING
If you manipulate, bridge or replace a faulty
fuse with a fuse of a higher amperage, the
electric cables could be overloaded. This may
result in a fire. There is a risk of an accident
and injury.
Always replace faulty fuses with specified new
fuses of the correct amperage.
! Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correct fuse rating for the system
concerned. Only use fuses marked with an
"S". Components or systems could other-
wise be damaged.
The fuses in your vehicle serve to disconnect
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions will
fail.
Blown fuses must be replaced with 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.
Before replacing a fuse
XSecure the vehicle against rolling away
( Y page 162).XSwitch off all electrical consumers.XTurn the key to position 0 in the ignition
lock and remove it ( Y page 145). All indi-
cator lamps in the instrument cluster must
be off.
The fuses are located in various fuse boxes:
R fuse box in the engine compartment on the
left-hand side of the vehicle, when viewed
in the direction of travel
R fuse box in the front-passenger footwell
The fuse allocation chart is on the fuse box in
the front-passenger footwell ( Y page 313).
Fuse box in the engine compartment
GWARNING
When the bonnet is open, and the windscreen
wipers are set in motion, you can be injured
by the wiper linkage. There is a risk of injury.
Always switch off the windscreen wipers and
the ignition before opening the bonnet.
! 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.
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Interchanging the front and rear wheels of
differing dimensions can render the general
operating permit invalid.
Always pay attention to the instructions and
safety notes when changing a wheel
( Y page 324).
The wear patterns on the front and rear tyres
differ, depending on the operating conditions.
Interchange the wheels before a clear wear
pattern has formed on the tyres. Front tyres
typically wear more on the shoulders and the
rear tyres in the centre.
On vehicles that have the same size front and
rear wheels, you can interchange the wheels
every 5,000 to 10,000 km depending on the
degree of tyre wear. Ensure the direction of
rotation is maintained.
Clean the contact surfaces of the 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
GWARNING
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 a wheel
Preparing the vehicle
XStop the vehicle on solid, non-slippery and
level ground.XApply the electric parking brake manually
( Y page 163).XBring the front wheels into the straight-
ahead position.XVehicles with manual transmission:
fully depress the clutch pedal and engage
first or reverse gear.XVehicles with automatic transmission:
move the DIRECT SELECT lever to P.XSwitch off the engine.XRemove the key from the ignition lock.XIf a trailer is coupled to the vehicle, uncou-
ple it.XIf included in the vehicle equipment,
remove the tyre-change tool kit from the
vehicle.XSecure the vehicle to prevent it from rolling
away.
i Apart from certain country-specific varia-
tions, vehicles are not equipped with a tyre-
change tool kit. For information on which
tools are required to perform a wheel
change on your vehicle, consult a
Mercedes-Benz Service Centre.
Necessary wheel-changing tools can
include, for example:
R Jack
R Wheel chock
R Wheel wrench
Changing a wheel325Wheels and tyresZProCarManuals.com

Securing the vehicle against rolling
away
If your vehicle is equipped with a wheel chock,
it can be found in the tyre-change tool kit
( Y page 297).
The folding wheel chock is an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
XFold both plates upwards :.XFold out lower plate ;.XGuide the lugs on the lower plate fully into
the openings in base plate =.
Securing the vehicle on level ground
XOn 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
XOn light downhill gradients: place
chocks or other suitable items in front of
the wheels of the front and rear axle.
Raising the vehicle
GWARNING
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 positioning wheel chocks. Never
release the parking brake while the vehicle
is raised.
326Changing a wheelWheels and tyres
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When using an emergency spare wheel or
spare wheel of a different size, you must not
exceed the maximum speed of 80 km/h.
Snow chains must not be fitted to emergency
spare wheels.
General notes
i Apart from some country-specific var-
iants, the vehicles are not equipped with an
emergency spare wheel. Emergency spare
wheels are specific to the vehicle. For more
information on which emergency spare
wheels are approved for your vehicle, con-
sult a qualified specialist workshop.
You should regularly check the pressure of all
your tyres, including the emergency spare
wheel, particularly prior to long trips, and cor-
rect the pressure as necessary (Y page 319).
The value on the wheel or as given in the
"Wheels and tyres" section ( Y page 332) is
valid.
i If you are driving with the collapsible
emergency spare wheel fitted, the tyre
pressure loss warning system or the tyre
pressure monitor cannot function reliably.
Only restart the tyre pressure loss warning
system/tyre pressure monitor when the
defective wheel has been replaced with a
new wheel.
Vehicles with tyre pressure monitor:
after mounting an emergency spare wheel,
the system may still display the tyre pres-
sure of the removed wheel for a few
minutes. The value displayed for the moun-
ted emergency spare wheel is not the same
as the current tyre pressure of the emer-
gency spare wheel.
An emergency spare wheel may also be fitted
against the direction of rotation. Observe the
time restriction on use as well as the speed
limitation specified on the emergency spare
wheel.
Replace the tyres after six years at the latest,
regardless of wear. This also applies to the
emergency spare wheel.
Removing the emergency spare wheel
Vehicles with the "Minispare" emergency spare
wheel:
The "Minispare" emergency spare wheel is
secured in emergency spare wheel bag : in
the boot.
XOpen the boot lidXRelease securing straps ; on emergency
spare wheel bag :.XRemove emergency spare wheel bag :
with the "Minispare" emergency spare
wheel.XOpen emergency spare wheel bag : and
remove the "Minispare" emergency spare
wheel.
Observe the instructions and safety notes in
the "Fitting a wheel" section ( Y page 325).
Technical data
"Minispare" emer-
gency spare wheelTyresSteel wheelT 125/80 R17 99 M
Tyre pressure: 420 kPa
(4.2 bar/61 psi)3.5 B x 17 H2
ET 19.5332Emergency spare wheelWheels and tyres
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