ignition MERCEDES-BENZ B-Class 2017 W246 Owner's Guide

0043
Raises the backrest contour
0044 Softens the backrest contour
0087 Lowers the backrest contour
0085 Hardens the backrest contour Switching the seat heating on/off
Switching on/off G
WARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to excessively high tempera-
tures may be affected or they may even suffer burn-like injuries. There is a risk of injury.
Therefore, do not switch the seat heating on
repeatedly. The three red indicator lamps in the button indi-
cate the heating level you have selected.
The system automatically switches down from
level 3to level 2after approximately eight
minutes.
The system automatically switches down from
level 2to level 1after approximately ten
minutes.
The system automatically switches off approx-
imately 20 minutes after it is set to level 1.
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 109).
X To switch on: press button0043repeatedly
until the desired heating level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off.
Problems with the seat heating Problem
Possible causes/consequences and
0050 0050Solutions The seat heating has
switched off prematurely
or cannot be switched
on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will switch
back on automatically. 82
SeatsSeats
, steering wheel and mirrors

Exterior mirrors
Adjusting the exterior mirrors G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the vehicle's drive system. G
WARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is a risk of an acci-
dent.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder. X
Turn the SmartKey to position 1or 2in the
ignition lock (Y page 109).
X Exterior mirror on the front-passenger side:
press button 0044.
Exterior mirror on the driver's side: press but- ton 0043.
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior mirror using button
0087as long as the indicator
lamp is lit.
X Press button 0087up, down, or to the right or
left until you have adjusted the exterior mirror
to the correct position. You should have a
good overview of traffic conditions.
The convex exterior mirrors provide a larger field
of vision.
After the engine has been started, the exterior
mirrors are automatically heated at low outside temperatures. Heating takes a maximum of ten
minutes.
i You can also heat up the exterior mirrors
manually by switching on the rear window
defroster.
Exterior mirror pushed out of position If an exterior mirror has been pushed out of
position, proceed as follows:
X Move the exterior mirror into the correct posi-
tion manually. Automatic anti-glare mirrors
G
WARNING
Electrolyte may escape if the glass in an auto- matic anti-glare mirror breaks. The electrolyte
is harmful and causes irritation. It must not
come into contact with your skin, eyes, res-
piratory organs or clothing or be swallowed.
There is a risk of injury.
If you come into contact with the electrolyte,
observe the following:
R Rinse off the electrolyte from your skin
immediately with water.
R Immediately rinse the electrolyte out of
your eyes thoroughly with clean water.
R If the electrolyte is swallowed, immediately
rinse your mouth out thoroughly. Do not
induce vomiting.
R If electrolyte comes into contact with your
skin or hair or is swallowed, seek medical
attention immediately. 84
MirrorsSeats, steering wheel and mirrors

R
Immediately change out of clothing which
has come into contact with electrolyte.
R If an allergic reaction occurs, seek medical
attention immediately.
The "Automatic anti-glare mirrors" function is
only available if the vehicle is equipped with the
"Mirrors package".
The rear-view mirror and the exterior mirror on
the driver's side automatically go into anti-glare mode if:
R the ignition is switched on and
R incident light from headlamps strikes the sen-
sor in the rear-view mirror
The mirrors do not go into anti-glare mode if
reverse gear is engaged or if the interior lighting
is switched on. Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking position You can set the front-passenger side exterior
mirror such that you can see the rear wheel on
that side as soon as you engage reverse gear.
You can store this position.
0043
Button for the driver's side exterior mirror
0044 Button for the front-passenger side exterior
mirror
0087 Button for the exterior mirror setting
0085 Memory button M
X Make sure that the vehicle is stationary.
X Turn the SmartKey to position 2in the ignition
lock (Y page 109).
X Press button 0044. X
Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the default parking position.
X Use button 0087to adjust the exterior mirror to
a position that allows you to see the rear
wheel and the curb.
The parking position is stored.
i If you shift the transmission to another posi-
tion, the front-passenger side exterior mirror
returns to the driving position.
Calling up a stored parking position set- ting X
Turn the SmartKey to position 2in the ignition
lock (Y page 109).
X Adjust the front-passenger side exterior mir-
ror using the corresponding button
(Y page 84).
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger side
moves back to its original position:
R as soon as you exceed a speed of 9 mph
(15 km/h)
R about ten seconds after you have disengaged
reverse gear
R when you use button 0043to select the exterior
mirror on the driver's side Memory function
Important safety notes
G
WARNING
If you use the memory function on the driver's side while driving, you could lose control of
the vehicle as a result of the adjustments
being made. There is a risk of an accident.
Only use the memory function on the driver's
side when the vehicle is stationary. G
WARNING
When the memory function adjusts the seat,
you and other vehicle occupants – particularly children – could become trapped. There is a
risk of injury. Memory function
85Seats, steering wheel and mirrors
Z

Exterior lighting
General notes
For reasons of safety, Mercedes-Benz recom-
mends that you drive with the lights switched on even during the daytime. In some countries,
operation of the headlamps varies due to legal
requirements and self-imposed obligations. Setting the exterior lighting
Setting options Exterior lighting can be set using the:
R light switch
R combination switch (Y page 88)
R on-board computer (Y page 166)
Light switch Operation
0047
0063
Left-hand standing lamps
0048 0064
Right-hand standing lamps
0049 0060
Parking lamps, license plate and
instrument cluster lighting
004A 0058
Automatic headlamp mode, controlled
by the light sensor
004B0058 Low-beam/high-beam headlamps
0084 005E
Rear fog lamp
If you hear a warning tone when you leave the
vehicle, the lights may still be switched on.
X Turn the light switch to the 0058position.
The exterior lighting (except the parking/stand- ing lamps) switches off automatically if you:
R remove the SmartKey from the ignition lock
R open the driver's door with the SmartKey in
position 0in the ignition lock Automatic headlamp mode
0058 is the favored light switch setting. The light
setting is automatically selected according to
the brightness of the ambient light (exception:
poor visibility due to weather conditions such as fog, snow or spray):
R SmartKey in position 1in the ignition lock: the
parking lamps are switched on/off automat-
ically depending on the brightness of the
ambient light.
R With the drive system running: if you have
switched on the Daytime Running Lights
Daytime Running Lights
function in the on-board computer, the day-
time running lamps or the parking lamps and
low-beam headlamps are switched on or off
automatically depending on the brightness of
the ambient light.
X To switch on the automatic headlamp
mode:
turn the light switch to the 0058posi-
tion. G
WARNING
When the light switch is set to 0058, the low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There is a risk of an
accident.
In such situations, turn the light switch to
0058.
The automatic headlamp feature is only an aid.
The driver is responsible for the vehicle's light-
ing at all times.
The daytime running lamps improve the visibility
of your vehicle during the day. To do this, the
daytime running lamps function must be
switched on using the on-board computer
(Y page 166).
If the drive system is switched on and you turn
the light switch to 0060or0058, the manual
settings take precedence over the daytime run- ning lamps.
Low-beam headlamps Even if the light sensor does not detect that it isdark, the parking lamps and low-beam head-
lamps come on when the ignition is switched on
and the light switch is set to the 0058position.
This is a particularly useful function in the event of rain and fog. Exterior lighting
87Lights and windshield wipers Z

X
To switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to posi-
tion 2or start the drive system.
X Turn the light switch to 0058.
The green 0058indicator lamp in the instru-
ment cluster lights up.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick fog. Please take note of the country-specific
regulations for the use of rear fog lamps.
X To switch on the rear fog lamp: turn the
SmartKey in the ignition lock to position 2or
start the drive system.
X Turn the light switch to 0058or0058.
X Press the 005Ebutton.
The yellow 005Eindicator lamp in the instru-
ment cluster lights up.
X To switch off the rear fog lamp: press the
005E button.
The yellow 005Eindicator lamp in the instru-
ment cluster goes out.
Parking lamps ! If the battery charge level is very low, the
parking lamps or standing lamps are switched off automatically in order to preserve energy
to start the drive system. Always park your
vehicle safely and sufficiently lit according to
legal standards. Avoid using the parking
lamps 0060for periods of several hours.
Where possible, switch the right-hand 0064
or left-hand 0063standing lamp on.
X To switch on: turn the light switch to 0060.
The green 0060indicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures the
corresponding side of the vehicle is illuminated. X To switch on the standing lamps: the
SmartKey should not be in the ignition lock or it should be in position 0.
X Turn the light switch to 0063(left-hand side of
the vehicle) or 0064(right-hand side of the
vehicle). Combination switch
X
To indicate briefly: press the combination
switch briefly to the pressure point in the
direction of arrow 0044or0085.
The corresponding turn signal flashes three
times.
X To indicate: press the combination switch
beyond the pressure point in the direction of
arrow 0044or0085.
X To switch on the high-beam headlamps:
turn the light switch to 0058or0058.
X Press the combination switch beyond the
pressure point in the direction of arrow 0043.
The high-beam headlamps only switch on in
the 0058 position if the low-beam headlamps
are on.
The blue 0057indicator lamp in the instru-
ment cluster lights up when the high-beam
headlamps are switched on.
X To switch off the high-beam head-
lamps:move the combination switch back to
its normal position.
The blue
0057indicator lamp in the instru-
ment cluster goes out.
X To switch on the high-beam flasher: pull
the combination switch in the direction of
arrow 0087. 88
Exterior lightingLights and
windshield wipers

Hazard warning lamps
X
To switch on the hazard warning lamps:
press button
0043.
All turn signals flash. If you now switch on a
turn signal using the combination switch, only the turn signal lamp on the corresponding
side of the vehicle will flash.
X To switch off the hazard warning lamps:
press button
0043.
The hazard warning lamps automatically switch
on if:
R an air bag is deployed or
R the vehicle decelerates rapidly from a speed
of above 45 mph (70 km/h) and comes to a
standstill
The hazard warning lamps switch off automati-
cally if the vehicle reaches a speed of above
6 mph (10 km/h) again after a full brake appli-
cation.
The hazard warning lamps still operate if the
ignition is switched off. Cornering light function
The cornering light function improves the illu-
mination of the road over a wide angle in the direction you are turning, enabling better visi-
bility in tight bends, for example. It can only be
activated when the low-beam headlamps are
switched on.
Active:
R if you are driving at speeds below 25 mph
(40 km/h) and switch on the turn signal or
turn the steering wheel
R if you are driving at speeds between 25 mph
(40 km/h) and 45 mph (70 km/h) and turn
the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after no
more than three minutes. Headlamps fogged up on the inside
Certain climatic and physical conditions may
cause moisture to form in the headlamp. This
moisture does not affect the functionality of the headlamp. Interior lighting
Overview of interior lighting
Front overhead control panel 0043
003D Switches the left-hand front reading
lamp on or off
0044 004A Switches the front interior lighting on
0087 0043 Switches the rear interior lighting on or
off
0085 0033 Switches the front interior lighting/
automatic interior lighting control off
0083 003D Switches the right-hand front reading
lamp on or off
0084 Switches the automatic interior lighting con-
trol on Interior lighting
89Lights and windshield wipers Z

Control panel in the grab handle in the
rear compartment 0043
To switch the reading lamp on/off Interior lighting control
General notes In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
except when the SmartKey is in position 2in the
ignition lock.
The color and brightness for the ambient lighting
may be set via the multimedia system; see the
separate operating instructions.
Automatic interior lighting control X
To switch on: set the switch to center posi-
tion 0084.
X To switch off: set the switch to the 0033
position.
The interior lighting automatically switches on if you:
R unlock the vehicle
R open a door
R remove the SmartKey from the ignition lock
The interior light is activated for a short while
when the SmartKey is removed from the ignition
lock. This delayed switch-off can be adjusted via
the multimedia system; see the separate oper-
ating instructions. Replacing bulbs
Important safety notes
Xenon bulbs: G
DANGER
Xenon bulbs carry a high voltage. You can get an electric shock if you remove the cover of
the Xenon bulb and touch the electrical con-
tacts. There is a risk of fatal injury.
Never touch the parts or the electrical con-
tacts of the Xenon bulb. Always have work on
the Xenon bulbs carried out at a qualified spe-
cialist workshop.
If your vehicle is equipped with Xenon bulbs, you
can recognize this by the following: the cone of light from the Xenon bulbs moves from the top
to the bottom and back again when you start the
drive system. For this to be observed, the lights must be switched on before the drive system is
started.
Headlamps and lights are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times. Have
the headlamp setting checked regularly.
Other bulbs: G
WARNING
Bulbs, lamps and connectors can get very hot when operating. If you change a bulb, you
could burn yourself on these components.
There is a risk of injury.
Allow these components to cool down before changing a bulb.
Do not use a bulb if it has been dropped or if its glass tube has been scratched.
The bulb may explode if
R you touch it
R it is hot
R you drop it
R you scratch it
Use bulbs only in closed lamps that have been
designed for this purpose. Only install spare
bulbs of the same type and the specified volt-
age.
Marks on the glass tube reduce the service life
of the bulbs. Do not touch the glass tube with
your bare hands. If necessary, clean the glass 90
Replacing bulbsLights and windshield wipers

X
Lever out lamp lens 0043and remove it.
X Replace the bulb.
X Insert lamp lens 0043into the license plate lamp
and press it in until it engages. Windshield wipers
Switching the windshield wipers
on/off
! Do not operate the windshield wipers when
the windshield is dry, as this could damage
the wiper blades. Moreover, dust that has col-
lected on the windshield can scratch the glass
if wiping takes place when the windshield is
dry.
If it is necessary to switch on the windshield
wipers in dry weather conditions, always use
washer fluid when operating the windshield
wipers.
! If the windshield wipers leave smears on the
windshield after the vehicle has been washed
in an automatic car wash, wax or other resi-
dues may be the reason for this. Clean the
windshield using washer fluid after washing
the vehicle in an automatic car wash. Combination switch
0047
003F Windshield wiper off
0048 0062 Intermittent wipe, low (rain sensor set
to low sensitivity)
0049 0063 Intermittent wipe, high (rain sensor
set to high sensitivity)
004A 00AA Continuous wipe, slow
004B 00A9 Continuous wipe, fast
0084 00D3 Single wipe/00D4 Wipes the wind-
shield using washer fluid X
Switch on the ignition.
X Turn the combination switch to the corre-
sponding position.
! Vehicles with a rain sensor: if the windshield
becomes dirty in dry weather conditions, the
windshield wipers may be activated inadver-
tently. This could then damage the windshield
wiper blades or scratch the windshield.
For this reason, you should always switch off
the windshield wipers in dry weather.
Vehicles with a rain sensor: in the 0062or0063
position, the appropriate wiping frequency is
automatically set according to the intensity of
the rain. In the 0063position, the rain sensor is
more sensitive than in the 0062position, caus-
ing the windshield wiper to wipe more fre-
quently.
If the wiper blades are worn, the windshield will no longer be wiped properly. This could prevent
you from observing the traffic conditions. Switching the rear window wiper on/
off Combination switch
0043
00C5 Switch
0048 00E2 Wipes with washer fluid
0049 ISwitches on intermittent wiping
004A 0Switches off intermittent wiping
004B 00E2 Wipes with washer fluid
X Switch on the ignition.
X Slide switch 0043on the combination switch to
the corresponding position.
When the rear window wiper is switched on,
the 00C5 symbol appears in the assistance
graphic in the instrument cluster. Further
information on the assistance graphic
(Y page 162). Windshield wipers
95Lights and windshield wipers Z

Replacing the wiper blades
Important safety notes G
WARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could be trapped by the wiper arm. There is a risk of
injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
! To avoid damaging the wiper blades, make
sure that you touch only the wiper arm of the
wiper.
! Never open the hood/tailgate if a wiper arm
has been folded away from the windshield/
rear window.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield/rear
window.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release the
wiper arm without a wiper blade and it falls
onto the windshield/rear window, the wind-
shield/rear window may be damaged by the
force of the impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified spe-
cialist workshop.
Changing the windshield wiper blades Removing the wiper blades
X Vehicles without KEYLESS-GO: remove the
SmartKey from the ignition lock.
X Vehicles with KEYLESS-GO: switch off the
engine.
X Fold the wiper arm away from the windshield. X
Hold on to the wiper arm with one hand. With
the other hand, turn wiper blade in direction
of arrow 0043away from the wiper arm as far as
it will go.
X Slide catch 0044in the direction of arrow 0087
until it engages in the removal position with a noticeable click. X
Remove the wiper blade in the direction of
arrow 0085away from the wiper arm.
Installing the wiper blades X
Insert the new wiper blade into the wiper arm
in the direction of arrow 0043.96
Windshield wipersLights and windshield wipers

X
Slide catch 0044in the direction of arrow 0087
until it engages in the locking position with a
noticeable click.
X Make sure that the wiper blade is seated cor-
rectly.
X Fold the wiper arm back onto the windshield. X
Remove protective film 0043of the service indi-
cator on the tip of the wiper blade.
If the color of the service indicator changes from black to yellow, the wiper blades should be
replaced.
i The duration of the color change varies
depending on the usage conditions. Replacing the rear window wiper blade Removing a wiper blade
X
Vehicles without KEYLESS-GO: remove the
SmartKey from the ignition lock.
X Vehicles with KEYLESS-GO: switch off the
engine.
X Fold wiper arm 0043away from the rear window
until you feel it engage.
X Position wiper blade 0044at a right angle to
wiper arm 0043.
X Hold wiper arm 0043and press wiper blade 0044
in the direction of the arrow until it releases.
X Remove wiper blade 0044.
Installing a wiper blade
X Place new wiper blade 0044onto wiper arm 0043.
X Hold wiper arm 0043and press wiper blade 0044
in the opposite direction to the arrow until it
engages.
X Make sure that wiper blade 0044is seated cor-
rectly.
X Position wiper blade 0044parallel to wiper
arm 0043.
X Fold wiper arm 0043back onto the rear window. Windshield wipers
97Lights and windshield wipers Z