2017 MERCEDES-BENZ B-Class Engine

Front wheel
Rear wheel
X Bring the vehicle and wheels into a suitable
position so that you can attach test gage 0083.
X Secure the vehicle against rolling away
(Y page 128).
X Engage park position P.
X Switch off the drive system.
X Place test gage 0083between the wheel's
spokes on brake pad/lining 0087.X
Hold test gage 0083vertically on brake disc 0043
and slide measuring pin 0044onto brake
disc 0043.
X Check which color field 0085the arrow on
measuring pin 0044is pointing to.
Green: the brake pad/lining thickness is suf-
ficient.
Red: the brake pad/lining thickness is not
sufficient. Have the brake pads/lining
checked at a qualified specialist workshop.
To avoid an inaccurate measurement: R make sure you position the wheels suitably
R do not put the measuring pin on a recess in
the brake disc Driving on wet roads
Hydroplaning If water has accumulated to a certain depth on
the road surface, there is a danger of hydro-
planing occurring, even if:
R you drive at low speeds
R the tires have adequate tread depth
For this reason, in the event of heavy rain or in
conditions in which hydroplaning may occur,
you must drive in the following manner:
R lower your speed
R avoid ruts
R avoid sudden steering movements
R brake carefully
Driving on flooded roads !
Do not drive through flooded areas. Check
the depth of any water before driving through
it. Drive slowly through standing water. Oth-
erwise, water may enter the vehicle interior or
the engine compartment. This can damage
the electronic components in the engine or
the automatic transmission. Water can also
be drawn in by the engine's air suction nozzles and this can cause engine damage. Winter driving
G
WARNING
If you increase the recuperation level on slip- pery road surfaces, the drive wheels may lose Driving tips
135Driving and parking
Z

their traction. There is an increased danger of
skidding and accidents.
Do not increase the recuperation level on slip- pery road surfaces.
Have your vehicle winter-proofed at a qualified
specialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur- faces. Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise control.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the DIRECT SELECT lever to position N.
The outside temperature indicator is not
designed to serve as an ice-warning device and is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in
wooded areas or on bridges.
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
For more information on driving with snow
chains, see (Y page 259).
For more information on driving with summer
tires, see (Y page 259).
Observe the notes in the "Winter operation" sec-
tion (Y page 259). Driving systems
Cruise control
General notes Cruise control maintains a constant road speed
for you. It brakes automatically in order to avoid
exceeding the set speed. Change into transmis-
sion position D-
(Y page 115) on long and steep
downhill gradients. This increases recuperation
in overrun mode. This relieves the load on the
brake system and prevents the brakes from
overheating and wearing too quickly.
When the engine is running, you can use the
cruise control lever to limit the speed to any
speed between 20 mph (30 km/h) and the tech-
nically permitted maximum speed of the vehicle. Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a steady
speed for a prolonged period.
The speed indicated in the speedometer may
differ slightly from the speed stored.
Important safety notes If you fail to adapt your driving style, cruise con-
trol can neither reduce the risk of an accident
nor override the laws of physics. Cruise control
cannot take into account the road, traffic and
weather conditions. Cruise control is only an
aid. You are responsible for the distance to the
vehicle in front, for vehicle speed, for braking in
good time and for staying in your lane.
Do not use cruise control:
R in road and traffic conditions which do not
allow you to maintain a constant speed e.g. in
heavy traffic or on winding roads
R on slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid
R in poor visibility, e.g. due to fog, heavy rain or
snow
If there is a change of drivers, advise the new
driver of the speed stored.
Cruise control lever 0043
Activates or increases speed
0044 Activates or reduces speed
0087 Deactivates cruise control
0085 Activates at the current speed/last stored
speed
When you activate cruise control, the stored
speed is shown in the multifunction display for
five seconds. 136
Driving systemsDriving an
d parking

i
When you switch off the engine, the last
speed stored is cleared. HOLD function
General notes The HOLD function can assist the driver in the
following situations:
R when pulling away, especially on steep slopes
R when maneuvering on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the driver
having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Important safety notes G
WARNING
When leaving the vehicle, it can still roll away despite being braked by the HOLD function if:
R there is a malfunction in the system or in
the voltage supply.
R the HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
R the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off the HOLD function and secure the vehicle
against rolling away.
! If the HOLD function is activated, the vehicle
brakes automatically in certain situations.
To prevent damage to the vehicle, deactivate
the HOLD function in the following or other
similar situations:
R when towing the vehicle
R in the car wash
Deactivating the HOLD function (Y page 138).Activation conditions You can activate the HOLD function if:
R the vehicle is stationary
R the engine is running or if it has been auto-
matically switched off by the ECO start/stop
function
R the driver's door is closed or your seat belt is
fastened
R the electric parking brake is released
R the transmission position D,Ror Nis engaged
Activating the HOLD function X
Make sure that the activation conditions are
met.
X Depress the brake pedal.
X Quickly depress the brake pedal further
until 0043appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake pedal the first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivating the HOLD function The HOLD function is deactivated automatically
if:
R you accelerate. On vehicles with automatic
transmission: only when the transmission is in
position Dor R.
R the transmission is in position P.
R you depress the brake pedal again with a cer-
tain amount of pressure until 0043disappears
from the multifunction display.
R you secure the vehicle using the electric park-
ing brake.
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake. 138
Driving systemsDriving and parking

The electric parking brake secures the vehicle
automatically if the HOLD function is activated
and:
R the driver's seat belt is not fastened and the
driver's door is open.
R the engine is switched off, unless it is auto-
matically switched off by the ECO start/stop
function.
R a system malfunction occurs.
R the power supply is insufficient.
The Brake Immediately Brake Immediately message may also
appear in the multifunction display.
X Immediately depress the brake firmly until the
warning message in the multifunction display goes out.
The HOLD function is deactivated. The horn
sounds at regular intervals if you have switched
off the engine, released the seat belt and
opened the driver's door with the HOLD function activated. The sounding of the horn alerts you to
the fact that the HOLD function is still activated.
If you attempt to lock the vehicle, the tone
becomes louder. The vehicle cannot be locked
until you have deactivated the HOLD function.
i After switching off the engine, it can only be
started again once you have deactivated the
HOLD function. Parking Assist PARKTRONIC
Important safety notes Parking Assist PARKTRONIC is an electronic
parking aid with ultrasound. It monitors the area
around your vehicle using six sensors in the
front bumper and six sensors in the rear
bumper. Parking Assist PARKTRONIC visually
and audibly indicates the distance between your
vehicle and an object.
Parking Assist PARKTRONIC is only an aid. It is
not a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking and
exiting a parking space. When maneuvering,
parking or pulling out of a parking space, make
sure that there are no persons, animals or
objects in the area in which you are maneuver-
ing.
! When parking, pay particular attention to
objects above or below the sensors, such as
flower pots or trailer drawbars. Parking Assist PARKTRONIC does not detect such objects
when they are in the immediate vicinity of the
vehicle. You could damage the vehicle or the
objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic car
wash, the compressed-air brakes of a truck or
a pneumatic drill could cause Parking Assist
PARKTRONIC to malfunction.
Parking Assist PARKTRONIC may not function
correctly on uneven terrain.
Parking Assist PARKTRONIC is activated auto-
matically when you: R switch on the ignition
R shift the transmission to position D,Ror N
R shift the transmission to position D,Ror N
R release the electric parking brake
Parking Assist PARKTRONIC is deactivated at
speeds above 11 mph (18 km/h) . It is reactiva-
ted at lower speeds.
Range of the sensors General notes
Parking Assist PARKTRONIC does not take into
account obstacles located:
R below the detection range, e.g. people, ani-
mals or objects.
R above the detection range, e.g. overhanging
loads, tail sections or loading ramps of goods
vehicles. 0043
Sensors in the front bumper, left-hand side
(example)
The sensors must be free from dirt, ice or slush. They can otherwise not function correctly. Clean
the sensors regularly, taking care not to scratch
or damage them (Y page 237). Driving systems
139Driving and parking Z

Range
0043
Detection range of front sensors
0044 Detection range of rear sensors
Front sensors Center Approx. 40 in (approx.
100 cm) Corners Approx. 24 in (approx.
60 cm) Rear sensors
Center Approx. 48 in (approx.
120 cm)
Corners Approx. 32 in (approx.
80 cm)
Minimum distance
Center Approx. 8 in (approx. 20 cm)
Corners Approx. 6 in (approx. 15 cm)
If there is an obstacle within this range, the rel-
evant warning displays light up and a warning
tone sounds. If the distance falls below the min- imum, the distance may no longer be shown. Warning displays
0043
Segments on the left-hand side of the vehi-
cle
0044 Segments on the right-hand side of the vehi-
cle
0087 Segments showing operational readiness
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is located on
the dashboard above the center air vents. The
warning display for the rear area is located on
the headliner in the rear compartment.
The warning display for each side of the vehicle
is divided into five yellow and two red segments.
Parking Assist PARKTRONIC is operational if yel-
low segments showing operational readiness 0087
light up.
The transmission position of the automatic
transmission and the direction in which the vehi-
cle is rolling determine which warning display is active when the engine is running. Transmission posi-
tion Warning display
D
Front area activated
R,
Nor the vehicle is
rolling backwards Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the vehi-
cle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an inter-
mittent warning tone for approximately two
seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two seconds. 140
Driving systemsDriving and parking

The
Parking Pilot Active Select R
Parking Pilot Active Select R
Observe Surroundings
Observe Surroundings message appears in
the multifunction display.
As soon as the parking procedure is complete,
the Parking Parking Pilot
PilotEnded
Endedmessage appears in
the multifunction display and a warning tone
sounds. The vehicle is now parked.
Parking Pilot no longer supports you with steer-
ing interventions and brake applications. When
Parking Pilot is ended, you must steer and brake again yourself. Parking Assist PARKTRONIC is
still available.
Parking tips:
R The way your vehicle is positioned in the park-
ing space after parking is dependent on vari-
ous factors. These include the position and
shape of the vehicles parked in front and
behind it and the conditions of the location. It
may be the case that Parking Pilot guides you
too far into a parking space, or not far enough
into it. In some cases, it may also lead you
across or onto the curb. If necessary, you
should abort the parking procedure with Park- ing Pilot.
R You can also select preselect transmission
position D. The vehicle redirects and does not
drive as far into the parking space. Should the transmission change take place too early, the
parking procedure will be canceled. A sensi-
ble parking position can no longer be ach-
ieved from this position.
Exiting a parking space In order for Parking Pilot to support you when
exiting the parking space:
R
you need to have parked using Parking Pilot.
R the border of the parking space must be high
enough at the front and the rear. A curb stone
is too small, for example.
R the border of the parking space must not be
too wide, as the position of the vehicle must
not exceed an angle of 45° to the starting
position as it is maneuvered into the parking
space.
R a maneuvering distance of at least 3.3 ft
(1.0 m) must be available.
Parking Pilot can assist you with exiting a park-
ing space only if you have parked the vehicle
parallel to the direction of travel using Parking
Pilot. X
Start the engine.
X Release the electric parking brake.
X Switch on the turn signal in the direction you
will drive out of the parking space.
X Shift the transmission to position Dor R.
The Start Parking Pilot?
Start Parking Pilot? Yes: OK Yes: OKNo:
No:
0038 message appears in the multifunction
display.
X To cancel the procedure: press the0038
button on the multifunction steering wheel or
pull away.
or X To exit a parking space using Parking
Pilot:
press the 0076button on the multi-
function steering wheel.
The Parking Pilot Active Accelerate
Parking Pilot Active Accelerate
and Brake and Brake Observe Surroundings
Observe Surroundings mes-
sage appears in the multifunction display.
X Let go of the multifunction steering wheel.
X Pull away, being ready to brake at all times. Do
not exceed a maximum speed of approx-
imately 6 mph (10 km/h) when exiting a park-
ing space. Otherwise, Parking Pilot is can-
celed immediately.
X Stop when Parking Assist PARKTRONIC
sounds the continuous warning tone, if not
before.
X Depending on the message or as required,
shift the transmission to position Dor R.
Parking Pilot immediately steers in the other
direction. The Parking Pilot Active
Parking Pilot Active
Accelerate and Brake Accelerate and Brake Observe Sur‐
Observe Sur‐
roundings
roundings message appears in the multi-
function display.
i You will achieve the best results by waiting
for the steering procedure to complete before
pulling away.
If you back up after activation, the steering
wheel is moved to the straight-ahead posi-
tion.
X Drive forwards and reverse as prompted by
the Parking Assist PARKTRONIC warning dis-
plays, several times if necessary.
Once you have exited the parking space com-
pletely, the steering wheel is moved to the
straight-ahead position. You hear a tone and the
Parking Parking Pilot
PilotFinished
Finished message appears in
the multifunction display. You will then have to
steer and merge into traffic on your own. Park-
ing Assist PARKTRONIC is still available. You can take over the steering before the vehicle has
exited the parking space completely. This is 144
Driving systemsDriving and parking

(200 km/h) range. If ATTENTION ASSIST
detects typical indicators of fatigue or increas-
ing lapses in concentration on the part of the
driver, it suggests taking a break.
Important safety notes ATTENTION ASSIST is only an aid to the driver. It
might not always recognize fatigue or increasing inattentiveness in time or fail to recognize them
at all. The system is not a substitute for a well-
rested and attentive driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all:
R if the length of the journey is less than approx-
imately 30 minutes
R if the road condition is poor, e.g. if the surface
is uneven or if there are potholes
R if there is a strong side wind
R if you have adopted a sporty driving style with
high cornering speeds or high rates of accel-
eration
R if you are predominantly driving slower than
37 mph (60 km/h) or faster than 125 mph
(200 km/ h)
R if the time has been set incorrectly
R in active driving situations, such as when you
change lanes or change your speed
ATTENTION ASSIST is reset when you continue
your journey and starts assessing your tiredness
again if:
R you switch off the engine
R you take off your seat belt and open the driv-
er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level You can have current status information dis-
played in the assistance menu (Y
page 162) of
the on-board computer.
X Select the Assistance display for Attention
Assist using the on-board computer
(Y page 162).
The following information is displayed: R Length of the journey since the last break.
R The Attention Attention Level
Leveldetermined by ATTEN-
TION ASSIST, displayed in a bar display in five levels from high to low
R If ATTENTION ASSIST is unable to calculate
the attention level and cannot output a warn-
ing, the System Passive System Passive message appears.
The bar display then changes the display,
such as when you are driving at a speed below 37 mph (60 km/h) or above 124 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activate ATTENTION ASSIST using the on-
board computer (Y page 163).
The system determines the attention level of
the driver depending on the setting selected:
Standard Standard selected: the sensitivity with which
the system determines the attention level is set to normal.
Sensitive
Sensitive selected: the sensitivity is set
higher. The attention level detected by Attention
Assist is adapted accordingly and the driver is
warned earlier.
When ATTENTION ASSIST is deactivated, the
00D7 symbol appears in the multifunction dis-
play in the assistance graphic display.
When ATTENTION ASSIST has been deactivated,
it is automatically reactivated after the engine
has been stopped. The sensitivity selected cor-
responds to the last selection activated (stand-
ard/sensitive).
Warning in the multifunction display If fatigue or increasing lapses in concentration
are detected, a warning appears in the multi-
function display:
ATTENTION ASSIST ATTENTION ASSIST Take a
Take a
Break!
Break!.
In addition to the message shown in the multi-
function display, you will then hear a warning
tone. Driving systems
149Driving and parking Z

Display messages
Possible causes/consequences and
0050
0050Solutions 00F0
Malfunction Visit Malfunction Visit
Workshop Workshop Malfunctions are present in the drive system and/or in the cooling
system.
X Visit a qualified specialist workshop immediately. Without starting Without starting
engine again, con‐ engine again, con‐
sult workshop sult workshop The vehicle's high-voltage electrical system is malfunctioning. A warn-
ing tone also sounds.
X Do not switch off the drive system.
X Visit a qualified specialist workshop immediately. 00F0
Stop Switch Engine Stop Switch Engine
Off Off There is a serious malfunction in the drive system. A warning tone also
sounds.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Do not tow the vehicle.
X Consult a qualified specialist workshop immediately. Driving systems
Display messages
Possible causes/consequences and
0050 0050Solutions 00AD
Attention Assist: Attention Assist:
Take a Break! Take a Break! Based on certain criteria, ATTENTION ASSIST has detected fatigue or
a lack of concentration on the part of the driver. A warning tone also
sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest. 00AD
Attention Assist Attention Assist
Inoperative Inoperative ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop. 00D9
Off Off The HOLD function is deactivated. the vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later (Y page 138). The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
X Check the activation conditions for the HOLD function
(Y page 138). 182
Display
messagesOn-board computer and displays