2015 MERCEDES-BENZ B-CLASS HATCHBACK wiring

auxiliary battery checking oil wheel bolts spare tire location octane tire type

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MERCEDES-BENZ B-CLASS HATCHBACK 2015 Owners Manual You could jeopardise the operating safety of
your vehicle if you use parts, tyres and wheels as
well as accessories relevant to safety which
have not been approved by Mercedes-Benz. This
could lead to

You could jeopardise the operating safety of
your vehicle if you use parts, tyres and wheels as
well as accessories relevant to safety which
have not been approved by Mercedes-Benz. This
could lead to malfunctions in safety-relevant
systems, e.g. the brake system. Only use genu- ine Mercedes-Benz parts or parts of equal qual-
ity. Only use tyres, wheels and accessories that
have been specifically approved for your vehi-
cle.
Mercedes-Benz tests genuine parts and conver-
sion parts and accessories that have been spe-
cifically approved for your vehicle for their reli-
ability, safety and suitability. Despite ongoing
market research, Mercedes-Benz is unable to
assess other parts. Mercedes-Benz therefore
accepts no responsibility for the use of such
parts in Mercedes-Benz vehicles, even if they
have been officially approved or independently
approved by a testing centre.
In Germany, certain parts are only officially
approved for installation or modification if they
comply with legal requirements. This also
applies to some other countries. All genuine
Mercedes-Benz parts meet the approval
requirements. The use of non-approved parts
may invalidate the vehicle's general operating
permit.
This is the case:
R if they cause a change of the vehicle type from
that for which the vehicle's general operating
permit was granted
R if other road users could be endangered
R if the noise levels are adversely affected
Always specify the vehicle identification number (VIN) (Y page 281) when ordering genuine
Mercedes-Benz parts. Owner's Manual
Vehicle equipment
This Owner's Manual describes all models and
all standard and optional equipment available
for your vehicle at the time of publication of the
Owner's Manual. Country-specific differences
are possible. Note that your vehicle may not be
fitted with all features described. This is also the case for systems and functions relevant to
safety. Therefore, the equipment on your vehiclemay differ from that in the descriptions and
illustrations. The original purchase contract documentation
for your vehicle contains a list of all of the sys-
tems in your vehicle.
Should you have any questions concerning
equipment and operation, please consult a
Mercedes-Benz Service Centre.
The Owner's Manual and Service Booklet are
important documents and should kept in the
vehicle. Operating safety
Important safety notes
Important safety notes G
WARNING
If you do not have the prescribed service/
maintenance work or necessary repairs car-
ried out, this could result in malfunctions or
system failures. There is a risk of an accident.
Always have the prescribed service/mainte-
nance work as well as necessary repairs car-
ried out at a qualified specialist workshop. G
WARNING
Modifications to electronic components, their software as well as wiring could affect their
function and/or the operation of other net-
worked components. This could in particular
also be the case for systems relevant to
safety. They might not function properly any-
more and/or jeopardise the operational
safety of the vehicle. There is an increased
risk of an accident and injury.
Do not attempt to modify the wiring as well as
electronic components or their software.
Always have work on electrical and electronic components carried out at a qualified special-
ist workshop.
! There is a risk of damage to the vehicle if:
R the vehicle becomes stuck, e.g. on a high
kerb or an unpaved road
R you drive too fast over an obstacle, e.g. a
kerb or a pothole in the road
R a heavy object strikes the underbody or
parts of the chassis 20
Introduction

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MERCEDES-BENZ B-CLASS HATCHBACK 2015 Owners Manual In situations like this, the body, the under-
body, chassis parts, wheels or tyres could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the

In situations like this, the body, the under-
body, chassis parts, wheels or tyres could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the case of an accident, no longer withstand the strain they are designed
for.
In such situations, have the vehicle checked
and repaired immediately at a qualified spe-
cialist workshop. If, upon continuing your
journey, you notice that driving safety is
impaired, pull over and stop the vehicle imme- diately, paying attention to road and traffic
conditions. In such cases, consult a qualified
specialist workshop.
If you make changes to electronic components,
their software or wiring, the general operating
permit for your vehicle may be rendered invalid.
Danger of electric shock G
DANGER
The vehicle's high voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Do not touch any high-voltage components
after an accident and never modify the vehi-
cle's high-voltage electrical system. Have the vehicle towed away after an accident and the vehicle's high-voltage electrical system
checked by a qualified specialist workshop. All of the vehicle's high-voltage electrical sys-
tem components are marked with yellow warn- ing stickers which warn you about high voltages.
The cables of the vehicle's high-voltage electri-
cal system are orange.
When towing a vehicle after an accident, be sure to observe the following sections:
R Transporting the vehicle (Y page 263)
R Towing the vehicle with the front axle raised
(Y page 262)
R Towing the vehicle with both axles on the
ground (Y page 262)
Read the important safety instructions on tow-
ing away (Y page 260).
The ignition must be switched off when carrying out general tasks, such as changing bulbs or
checking the coolant level.
Automatic switching off of the vehicle's high-voltage electrical system If the restraint systems are activated during an
accident, the vehicle's high-voltage electrical
system is automatically deactivated.
This is to ensure that you do not come into con-
tact with high voltage.
Automatic protection from switching
on of the vehicle's high-voltage electri-
cal system The vehicle's high-voltage electrical system is
not activated when the vehicle is started if:
R a serious electrical insulation fault is detected
in the vehicle's high-voltage electrical system
R an electrical connection in the vehicle's high-
voltage electrical system is disconnected
Automatic switching off of the charging
process The charging process is deactivated automati-
cally if:
R the high-voltage battery is fully charged.
The charging process is interrupted automati-
cally if:
R a serious electrical insulation fault is detected
in the vehicle's high-voltage electrical system
R an electrical connection in the vehicle's high-
voltage electrical system is disconnected Introduction
21 Z

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MERCEDES-BENZ B-CLASS HATCHBACK 2015 Owners Manual Useful information
i This Owner's Manual describes all models,
series and optional equipment for your vehi-
cle that were available at the time of going to
press. National variations are possible.

Useful information
i This Owner's Manual describes all models,
series and optional equipment for your vehi-
cle that were available at the time of going to
press. National variations are possible. Note
that your vehicle may not be equipped with all
of the functions described. This is also the
case for systems and functions relevant to
safety.
i Read the information on qualified specialist
workshops: (Y page 23). Occupant safety
Introduction to the restraint system
The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident. The restraint system can also reduce the forces
to which vehicle occupants are subjected during an accident.
The restraint system comprises:
R Seat belt system
R Airbags
R Child restraint system
R Child seat securing systems
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if all vehicle
occupants always:
R fasten their seat belts correctly
(Y page 37)
R adjust their seat and head restraint properly
(Y page 87).
As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position (Y page 86).
You also have to make sure that an airbag can
inflate properly if deployed (Y page 39).
An airbag supplements a correctly fastened seat belt. As an additional safety device, the airbag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if the protection of the seat belt is sufficient in an accident, the airbags are not deployed. In
the event of an accident, only the airbags that
increase protection in the relevant accident sit- uation are deployed. However, seat belts and
airbags generally do not protect against objects
penetrating the vehicle from the outside.
Information on the restraint system operation
can be found under "Triggering of belt tension-
ers and airbags" (Y page 46).
For more information about children travelling
with you in the vehicle, see "Children in the vehi-
cle" (Y page 49). Important safety notes
G
WARNING
If the restraint system is modified, it may no
longer work as intended. The restraint system
may then not perform its intended protective function by failing in an accident or triggering
unexpectedly, for example. There is an
increased risk of injury, possibly even fatal.
Never modify parts of the restraint system. Do not attempt to modify the wiring as well as
electronic components or their software.
If it is necessary to modify an airbag system to
accommodate a person with disabilities, con-
tact a Mercedes-Benz Service Centre for details. Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the drive system is run-
ning. Therefore, malfunctions can be detected in good time.
The 6 restraint system warning lamp in the
instrument cluster lights up when the ignition is switched on. It goes out no later than a few sec-
onds after the vehicle is started. The compo-
nents of the restraint system are in operational
readiness.
A malfunction has occurred if the 6restraint
system warning lamp:
R does not light up after the ignition is switched
on
R does not go out after a few seconds with the
drive system running
R lights up again while the drive system is run-
ning 34
Occupant safetySafety

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MERCEDES-BENZ B-CLASS HATCHBACK 2015 Owners Manual Approved aerial positions
:
Front roof area
; Rear roof area
= Rear wing
i On the rear wing, it is recommended that
you position the aerial on the side of the vehi-
cle closest to the centre of the ro

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