battery MERCEDES-BENZ CLS 2014 Service Manual

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of a
positive terminal and an earth point, in the engine compartment.
GWARNING
Battery acid is caustic. There isarisk of injury.
Avoid contact with the skin, eyes or clothing. Do not inhale any battery gases. Do not lean over
the battery. Keep children away from batteries. Wash battery acid immediately with water and
seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There isarisk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting. Do not lean overabattery.
GWARNING
During the charging process,abattery produces hydrogen gas. Ifashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There isarisk of an explosion.
RMake sure that the positive terminal ofaconnected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools onabattery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnectingabattery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnectthe battery terminals while the engine is running.
GWARNING
Adischarged battery can freeze at temperatures below freezingpoint.When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There isarisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
!Avoid repeated and lengthy startingattempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
Do not start the vehicle usingarapid charging device. If your vehicle's battery is discharged,
the engine can be jump-started from another vehicle or fromasecond battery using jumper
cables. Observe the following points:
RThe battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,
jump-start the vehicle usingasecond battery orajump-starting device.
RYou may only jump-start thevehiclewhen theengineand exhaust system are cold.
RDo notstart theengineifthebattery is frozen.Let thebattery thaw first.
326Jump-starting
Breakdown assistance

ROnly jump-start from batteries witha12Vvoltage rating.
ROnly use jumper cables which haveasufficient cross-section and insulated terminal clamps.
RIf the battery is fully discharged, leave the battery that is being used to jump-start connected
forafew minutes before attempting to start. This charges the battery slightly.
RMake sure that the two vehicles do not touch.
Make sure that:
Rthe jumper cables are not damaged.
Rwhen the jumper cables are connected to the battery, uninsulated sections of the terminal
clamp do not come into contact with other metal sections.
Rthe jumper cables cannot come into contact with parts which can move when the engine
is running, such as the V-belt pulley or the fan.
XApply the parking brake firmly.
XShift the transmission to positionP.
XSwitch off all electrical consumers (e.g. radio, blower, etc.).
XOpen the hood.
Position number%identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
XSlide coverof positive terminalin the direction of the arrow.
XConnect positive terminalon your vehicle to positive terminal$of donor battery%
using the jumper cable, always begin with positive terminalon your own vehicle first.
XStart the engine of the donor vehicle and run it at idling speed.
XConnect negative terminal!of donor battery%to ground pointof your vehicle using
the jumper cable, connecting the jumper cable to battery of other vehicle%first.
XStart the engine.
XBefore disconnecting the jumper cables, let the engine run for several minutes.
Jump-starting327
Breakdown assistance
Z

XFirst, remove the jumper cablesfrom earth pointand negative terminal!,then from
positiveclampand positiveterminal$.Begineachtime at the contacts on your own
vehicle first.
XClose coverof positiveclampafterremoving the jumper cables.
XHave the battery checkedataqualified specialist workshop.
iJump-startingisnot considered to beanormal operatingcondition.
iJumper cables and further information regardingjump-starting can be obtained at any
qualified specialist workshop.
Towing and tow-starting
Importantsafetynotes
GWARNING
Functionsrelevant to safety are restricted or
no longer available if:
Rthe engineisnot running.
Rthe brake system or the power steering is
malfunctioning.
Rthereisamalfunction in the voltage supply
or the vehicle's electrical system.
If your vehicle is being towed, much more
forcemay be necessary to steer or brake.
There isarisk of an accident.
In such cases, useatow bar. Beforetowing,
make sure that the steering moves freely.
GWARNING
If the weight of the vehicle to be towed or tow-
started is greater than the permissible gross
weight of your vehicle:
Rthe towingeye could detach itself
Rthe vehicle/trailer combination could
rollover.
There isarisk of an accident.
When towingortow-starting another vehicle,
its weight should not be greater than the
permissible gross weight of your vehicle.
Information on your vehicle's gross vehicle
weight ratingcan be found on the vehicle
identification plate (Ypage 372).
!If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
preventdamage to thevehicle,deactivate
DISTRONICPLUS and the HOLD function in
the following or other similar situations:
Rwhen towing the vehicle
Rin the car wash
!Only secure the tow rope or tow bar at the
towing eyes. Otherwise,the vehicle could
be damaged.
!Do not use the towing eye for recovery,
this could damage the vehicle.Ifindoubt,
recover the vehicle withacrane.
!When towing, pullawayslowly and
smoothly.Ifthe tractive power is too high,
the vehicles could be damaged.
!Do not tow with sling-type equipment.
This could damage the vehicle.
!When towing vehicles with KEYLESS-GO,
use the key instead of the Start/Stop
button. Otherwise, the automatic
transmission may shift to positionPwhen
the driver's or front-passenger door are
opened, which could lead to damage to the
transmission.
!The vehicle can be towedamaximum of
30 miles (50km). The towing speed of
30 mph (50 km/h) must not be exceeded.
If the vehicle has to be towed more than
30 miles(50km), the entire vehicle must be
raised and transported.
328Towing and tow-starting
Breakdown assistance

It is better to have the vehicle transported
than to have it towed.
If the vehicle has suffered transmission
damage, have it transported onatransporter
or trailer.
The automatic transmission must be in
positionNwhen the vehicle is being towed.
The battery must be connected and charged.
Otherwise,you:
Rcannot turn the SmartKey to position2in
the ignition lock
Rcannot shift the automatic transmission to
positionN
iDeactivate the automatic locking feature
(Ypage 83). You could otherwisebelocked
out when pushing or towing the vehicle.
Installing/removing the towing eye
Installing the towing eye
GWARNING
The exhaust tail pipe may be very hot. There
isarisk of burns when removing the rear
cover.
Do not touch the exhaust pipe.Take particular
carewhen removingtherear cover.
Example:towing eye covers
Towing eye covers (AMG vehicles)
The mountings for the removable towing eyes
are located in the bumpers. They are at the
front and at the rear, behind the covers.
XRemove the towing eye from the vehicle
tool kit (Ypage 320).
XPull coverout of the bumper in the
direction of the arrow by inserting your
fingers into the recess.
XPress the mark on coverinwards in the
direction of the arrow.
Towing and tow-starting329
Breakdown assistance
Z

XTurn the SmartKey to position2in the
ignition lock.
XShift the automatic transmission to
positionN.
As soon as the vehicle is loaded:
XPrevent the vehicle from rolling away by
applying the parking brake.
XShift the automatic transmission to
positionP.
XTurn the SmartKey to position0in the
ignition lock and remove the SmartKey
from the ignition lock.
XSecure the vehicle.
Notes on 4MATIC vehicles
!Vehicles with 4MATICmust not be towed
with either the frontorthe rear axle raised,
as doing so will damage the transmission.
If the vehicle has transmission damage or
damage to the front or rear axle, have it
transported onatransporter or trailer.
In the event of damage to the electrical
system
If the battery is defective, the automatic
transmission will be locked in positionP.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 (Ypage 326).
Have the vehicle transported onatransporter
or trailer.
Tow-starting (emergency engine
starting)
!Vehicles with automatic transmission
must not be started by tow-starting. This
could otherwise damage the transmission.
You can find information on "Jump-starting"
at (Ypage 326).
Fuses
Important safety notes
GWARNING
If you manipulate or bridgeafaulty fuse or if
you replace it withafuse withahigher
amperage, the electric cables could be
overloaded. This could result inafire. There
isarisk of an accident and injury.
Always replace faulty fuses with the specified
new fuses having the correct amperage.
!Only use fuses that have been approved
for Mercedes-Benzvehicles and which
have the correct fuse ratingfor the system
concerned. Otherwise, componentsor
systems could be damaged.
The fuses in your vehicle serve to close down
faulty circuits. Ifafuse blows,all the
componentsonthecircuit and their functions
stop operating.
Blown fusesmust be replacedwith fuses of
the same rating, which you can recognize by
the color and value. The fuse ratings are listed
in the fuse allocation chart.
Ifanewly inserted fuse also blows, have the
cause traced and rectified ataqualified
specialist workshop, e.g. an authorized
Mercedes-BenzCenter.
Beforechangingafuse
XSecure the vehicle against rolling away
(Ypage 167).
XSwitchoff all electrical consumers.
XTurn the SmartKey to position0in the
ignition lock and remove it (Ypage 147).
or
XOn vehicles with KEYLESS-GO, make sure
the ignition is switched off (Ypage 147).
All indicator lamps in the instrument cluster
must be off.
Fuses331
Breakdown assistance
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Curbweight
The weight ofavehicle with standard
equipment includingthemaximum capacity
of fuel, oil and coolant.Italso includes the air-
conditioningsystem and optional equipment
if these are installed in the vehicle, but does
not include passengers or luggage.
Maximumload rating
The maximum tireload is the maximum
permissible weight in kilograms or lbs for
whichatireisapproved.
Maximumpermissible tirepressure
Maximum permissible tirepressure for one
tire.
Maximumload on one tire
Maximum load on one tire. This is calculated
by dividingthe maximum axle load of one axle
by two.
PSI (pounds per squareinch)
Astandardunitofmeasure for tire pressure.
Aspect ratio
Relationship between tire height and tire
width in percent.
Tirepressure
This is pressure inside the tire applying an
outward forcetoeach square inch of the tire's
surface. The tire pressure is specified in
pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure should only
be corrected when the tires are cold.
Cold tirepressure
The tires are cold:
Rif the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
Rif the vehicle has been driven for less than
1mile (1.6 km).
Tread
The part of the tire that comes intocontact
with the road.
Bead
The tire bead ensures that the tire sits
securely on the wheel. There are several steel
wires in the bead to preventthe tire from
comingloose from the wheel rim.
Sidewall
The part of the tire between the tread and the
bead.
Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kilograms (5 lbs).
These optional extras, such as high-
performance brakes, level control,aroof rack
orahigh-performancebattery, are not
included in the curb weight and the weight of
the accessories.
TIN (Tire Identification Number)
This isaunique identifier which can be used
byatire manufacturer to identify tires, for
example foraproduct recall, and thus identify
the purchasers. The TIN is made up of the
manufacturer's identity code, tire size, tire
type code and the manufacturing date.
Load bearing index
The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity ofatire.
Traction
Traction is the result of friction between the
tires and the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are
distributed over the tire tread. If the tire tread
is level with the bars, the wear limit ofin
(1.6 mm) has been reached.
356All about wheels and tires
Wheels and tires