check engine light MERCEDES-BENZ B-Class ELECTRIC 2016 W246 Owner's Manual

Setting the temperature ................ 120
Switching air-recirculation mode
on/off ............................................ 123
Switching on/off ........................... 118
Switching the rear window
defroster on/off ............................ 122
Switching the ZONE function on/
off .................................................. 121
Cockpit
Overview .......................................... 30
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 194
Display message ............................ 209
Operation/notes .............................. 63
COMAND
Generated electricity ..................... 144
COMAND display
Cleaning ......................................... 278
Combination switch .......................... 102
Compass
Calibrating ..................................... 267
Calling up ....................................... 266
Magnetic field zone maps .............. 267
Setting ........................................... 267
Consumption statistics (on-board
computer) .......................................... 187
Convenience closing feature .............. 84
Convenience opening feature ............ 84
Convenience opening/closing (air-
recirculation mode) ........................... 123
Coolant (engine)
Checking the level ......................... 271
Filling capacity ............................... 336
Important safety notes .................. 336
Cooling
see Climate control
Copyright ............................................. 28
Cornering light function
Changing bulbs .............................. 107
Display message ............................ 214
Function/notes ............................. 103
Crash-responsive emergency light-
ing ....................................................... 104
Cruise control
Activation conditions ..................... 162
Cruise control lever ....................... 162 Deactivating ................................... 163
Display message ............................ 222
Driving system ............................... 162
Function/notes ............................. 162
Important safety notes .................. 162
Setting a speed .............................. 163
Storing and maintaining current
speed ............................................. 162
Cup holder
Center console .............................. 252
Important safety notes .................. 251
Rear compartment ......................... 252
Customer Assistance Cente r
( CAC) ..................................................... 26
Customer Relations Department ....... 26
D
Data
see Technical data
Daytime running lamps
Display message ............................ 216
Function/notes ............................. 100
Switching on/off (on-board com-
puter) ............................................. 198
Declarations of conformity ................. 25
Departure time
Setting (on-board computer) .......... 195
Diagnostics connection ...................... 25
Digital speedometer ......................... 189
DIRECT SELECT lever
Transmission ................................. 134
Display
High-voltage battery charge level
(instrument cluster) ....................... 184
Display messages
ASSYST PLUS ................................ 272
Calling up (on-board computer) ..... 200
Drive system .................................. 218
Driving systems ............................. 220
General notes ................................ 200
Hiding (on-board computer) ........... 200
Lights ............................................. 214
Safety systems .............................. 201
SmartKey ....................................... 228
Tires ............................................... 223
Vehicle ........................................... 225
Index7

ABS (Anti-lock Braking System)
Gene ral information
AB S regulates brake pressure in suchaway
that th e wheels do not lock when you brake.
This allows you to continue steering the vehi-
cle when braking.
The ! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
AB S works from a speed of about 5 mph
(8 km/h), regardless of road-surface condi-
tions. ABS works on slippery surfaces, even
when you only brake gently.
Important safety notes
iObserve the "Important safety notes" sec-
tion (
Ypage 62).
GWARNING
If AB S is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (
Ypage 232) and
display messages which may be shown in the
instrument cluster(
Ypage 201).
Braking
XIf ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over.
XTo make a fu ll brake application:
depress the brake pedal with full force.
If ABS intervenes when braking, you will fee la
pulsing in the brake pedal. The pulsating brake pedal can be an indica-
tion of hazardous road conditions, and func-
tion
s as a reminder to take extra care while
driving.
BAS (Brake Assist System)
Gene ral information
BA S operates in emergency braking situa-
tion s. If you depress the brake pedal quickly,
BA S automatically boosts the braking force,
thus shortening the stopping distance.
Important safety notes
iObserve the "Important safety notes"sec-
tion (
Ypage 62).
GWARNING
If BA S is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergenc y braking situation, depress
th e brake pedal with full force. ABSprevents
th e wheels from locking.
Braking
XKeep the brake pedal firmly depressed until
th eemergenc y braking situation is over.
AB Sprevents th e wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
COLLISION PREVENTION ASSIST
PLUS
Gene ral information
iObserve the "Important safety notes"sec-
tion (
Ypage 62).
COLLISION PREVENTION ASSIST PLUScon-
sists of a distance warning function with an
autonomous braking function and adaptive
Brake As sist.
Driving safety systems63
Safety
Z

GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
Due to the nature of the system, particularly
complicated but non-critical driving condi-
tions may also cause Brake Assist to inter-
vene.
If adaptive Brake Assist is not available due to
a malfunction in the radar sensor system, the
brake system remains available with full
brake boosting effect and BAS.
ESP®(Electronic Stability Program)
General notes
iObserve the "Important safety notes" sec-
tion (
Ypage 62).
ESP
®monitors driving stability and traction,
i.e. power transmission between the tires and
the road surface.
If ESP
®detects that the vehicle is deviating
from the direction desired by the driver, one or more wheels are braked to stabilize the
vehicle. The engine output is also modified to
keep the vehicle on the desired course within
physical limits. ESP
®assists the driver when
pulling away on wet or slippery roads. ESP®
can also stabilize the vehicle during braking.
ETS (Electronic Traction System)
iObserve the "Important safety notes" sec-
tion (
Ypage 62).
ETS traction control is part of ESP
®.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one side. In addition, more drive torque is trans-
ferred to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®.
Important safety notes
iObserve the "Important safety notes" sec-
tion (
Ypage 62).
GWARNING
If ESP
®is malfunctioning, ESP®is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®checked at a
qualified specialist workshop.
When towing your vehicle with the front axle
raised, observe the notes on ESP®
(Ypage 297).
When towing the vehicle with the rear axle
raised, observe the notes on ESP
®
(Ypage 297).
If the å ESP
®OFF warning lamp lights up
continuously, ESP®is deactivated.
If the ÷ ESP
®warning lamp and the å
warning lamp are lit continuously, ESP®is not
available due to a malfunction.
66Driving safety systems
Safety

Do not depress the brake pedal continuously
while the vehicle is in motion, e.g. causing the
brakes to rub by constantly applying light
pressure to the pedal. This results in exces-
sive and premature wear to the brake pads.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately.
Drive on for a short while. This allows the air-
flow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rain
without braking, there may be a delayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up
the brake discs, thereby drying them more
quickly and protecting them against corro-
sion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and brake pads. This can result in a significantly
longer braking distance.
RIn order to prevent any salt build-up, apply
the brakes occasionally while paying atten-
tion to the traffic conditions.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distance to the vehicle
ahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up in
the instrument cluster and
Ryou hear a warning tone while the engineis running
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked immedi-
ately. Consult a qualified specialist work-
shop to arrange this.
!A function or performance test should
only be carried out on a 2-axle dynamom-
eter. If you wish to operate the vehicle on
such a dynamometer, please consult a
qualified specialist workshop in advance.
You could otherwise damage the drive train
or the brake system.
!As the ESP®system operates automati-
cally, the engine and the ignition must be
switched off (the SmartKey must be in posi-
tion 0or 1in the ignition lock) if:
Rthe electric parking brake is tested on a
brake dynamometer (for a maximum of
ten second s)
Rthe vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP
®
may seriously damage the brake system.
Driving tips159
Driving and parking
Z

XMake sure that the windshield wipers are
switched off.
XPull release lever:on the hood.
The hood is released.
XReach into the gap between the hood and
the radiator trim and press hood catch
lever ;to the left.
XRaise the hood.
XPull support strut ?out of bracket A.
XLift up support strut ?and insert it into
yellow retaining clip =.
Closing the hood
XRaise the hood slightly and, at the same
time, remove support strut ?from yellow
retaining clip =.
XSwing support strut ?down and press it
into bracket Auntil it engages.
XLower the hood and let it fall from a height
of approximately 8 in (20 cm).
XCheck that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Do not press the hood
closed. Open the hood again and close it
with a little more force.
Checking and adding other service
products
Checking coolant level
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
!The coolant may only be checked and cor-
rected when the engine is cool (coolant
temperature below 104 ‡ (40 †). Check-
ing the coolant when the coolant tempera-
ture is above 104 ‡ (40 †) may result in
damage to the engine or to the engine cool-
ing system.
Engine compartment271
Maintenance and care
Z

Allow the frozen battery to thaw out before
charging it or jump-starting.
!Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
!Onlycharge the battery using the jump-
starting connection point.
The jump-starting connection point is in the
engine compartment (
Ypage 292).
XOpen the hood.
XConnect the battery charger to the positive terminal and ground point in the same
order as when connecting the donor bat-
tery in the jump-starting procedure
(
Ypage 292).
If the indicator/warning lamps do not light up
at low temperatures, it is very likely that the
discharged battery has frozen. In this case
you may neither jump-start the vehicle nor
charge the battery. The service life of a
thawed-out battery may be shorter. The start-
ing characteristics can be impaired, particu-
larly at low temperatures. Have the thawed-
out battery checked at a qualified specialist
workshop.
Only charge the installed battery with a bat-
tery charger which has been tested and
approved by Mercedes-Benz. A battery
charger unit specially adapted for Mercedes-
Benz vehicles and tested and approved by
Mercedes-Benz is available as an accessory.
It permits the charging of the battery in its
installed position. Contact an authorized
Mercedes-Benz Center for further informa-
tion and availability. Read the battery charg-
er's ope rating instructions before charging
the battery.
High-voltage battery – important
safety notes
GDANGER
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.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle'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.
GWARNING
In the event of a vehicle fire, the internal pres- sure of the high-voltage battery can exceed a
critical value. In this case flammable gas
escapes through a ventilation valve on the
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger zone immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
The vehicle's high voltage electrical system is
under high voltage.
RDo not handle high-voltage components orthe orange cables of the vehicle's high-volt-
age electrical system.
RDo not touch high-voltage components or
the orange cables of the high-voltage elec-
trical system when a vehicle has been
involved in a crash.
RDo not touch any damaged components or
the damaged orange cables of the vehicle's
high-voltage electrical system.
RDo not remove the covers of the high-volt-
age electrical system components that are
marked with a warning sticker.
Do not leave the vehicle parked for longer
than 14 days with a high-voltage battery con- dition of charge below 20%.
You can check the condition of charge in the
charge level display (
Ypage 184).
If you park the vehicle and leave it stationary
for longer periods, connect it to a power sup-
ply.
290Batteries
Breakdown assistance

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of a
positive terminal and a ground point, in the engine compartment.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over a battery.
GWARNING
During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks
are created, the hydrogen gas can ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a connected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools on a battery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnecting a battery.
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 disconnect the battery terminals while the engine is running.
GWARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion. Allow the frozen battery to thaw out before charging it or jump-starting.
!Avoid repeated and lengthy starting attempts.
Do not use a rapid-charging device to start the engine.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the
discharged battery has frozen. In this case you may neither jump-start the vehicle nor charge the battery. The service life of a thawed-out battery may be shorter. Have the thawed-out
battery checked at a qualified specialist workshop.
If the 12 V battery is discharged, or after the vehicle has been jump-started, the Service
RequiredDoNotShiftGearsVisitDealermessage appears. There is a malfunction in
the on-board voltage. Visit a qualified specialist workshop immediately.
292Jump-starting
Breakdown assistance