ECU SMART FORTWO 2016 Workshop Manual

switched on, use the combination switch as
usual. In this case, only the indicator
lamps for the direction of travel flash.
After resetting the combination switch, the
hazard warning lamp starts flashing again.
Vehicles with automatic transmission: the
automatic transmission automatically shifts
to position Pwhen you open the driver's or
front-passenger door or when you remove the
key from the ignition lock. In order to ensure
that the automatic transmission stays in
position Nwhen towing the vehicle, you must
observe the following points:
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 2in the igni-
tion lock.
XDepress and hold the brake pedal.
XShift the automatic transmission to posi-
tion N.
Vehicles with manual transmission:
XLeave the SmartKey in position 2in the
ignition lock.
XRelease the brake pedal.
XRelease the parking brake.
XSwitch on the hazard warning lamps
(Ypage 69).
It is important that you observe the safety
instructions when towing away your vehicle
(
Ypage 170).
Transporting the vehicle
!
You may only secure the vehicle by the
wheels, not by parts of the vehicle such as
axle or steering components. Otherwise,
the vehicle could be damaged.
XVehicles with automatic transmission:
turn the SmartKey to position 2in the igni-
tion lock (
Ypage 87).
XVehicles with manual transmission:
depress the clutch pedal fully and select
neutral.
XShift the transmission to position N.
As soon as the vehicle has been loaded:
XPrevent the vehicle from rolling away by
applying the parking brake.
XVehicles with automatic transmission:
shift the transmission to position P.
XVehicles with manual transmission:
depress the clutch pedal fully and engage
first or reverse gear.
XTurn the SmartKey to position0in the igni-
tion lock and remove it.
XSecure the vehicle.
The towing eye can be used to pull the vehicle
onto a trailer or transporter for transporting
purposes.
Tow-starting (emergency engine start-
ing)
!
Vehicles with automatic transmission
must not be started by tow-starting. This
could otherwise damage the transmission.
iYou can find information on "Jump-start-
ing" at (Ypage 168).
Before tow-starting:
Rthe battery must be connected
Rthe engine must be cold
Rthe exhaust system has cooled down.
XSwitch on the hazard warning lamps
(Ypage 69).
XInstall the towing eye (Ypage 171).
XSecure the rigid towing bar or the towing
rope.
XDepress and hold the brake pedal.
XTurn the SmartKey to position 2in the igni-
tion lock.
XDepress the clutch pedal fully, engage sec-
ond gear and keep the clutch pedal fully
depressed.
XRelease the brake pedal.
XTow-start the vehicle.
XRelease the clutch pedal slowly; do not
depress the accelerator pedal while doing
so.
XWhen the engine is started, immediately
depress the clutch pedal fully and select
neutral.
XPull over at a suitable place and stop the
vehicle safely, paying attention to road
and traffic conditions.
XSecure the vehicle against rolling away
with the parking brake.
XRemove the rigid towing bar or towing
rope.
172Towing and tow-starting
>> Breakdown assistance.

XRemove the towing eye (Ypage 171).
XSwitch off the hazard warning lamps.
Fuses
Important safety notes
GWARNING
If you manipulate or bridge a faulty fuse or if you replace it with a fuse with a higher
amperage, the electric cables could be
overloaded. This could result in a fire.
There is a risk of an accident and injury.
Always replace faulty fuses with the speci-
fied new fuses having the correct amper-
age.
!Only use fuses that have been approved for
smart vehicles and which have the correct
fuse rating for the system concerned. Oth-
erwise, components or systems could be
damaged.
The fuses in your vehicle serve to close down
faulty circuits. If a fuse blows, all the com-
ponents on the circuit and their functions
stop operating.
Blown fuses must be replaced with fuses of the
same rating, which you can recognize by the
color and value. The fuse ratings are listed in
the fuse allocation chart (
Ypage 175).
If a newly inserted fuse also blows, have the
cause traced and rectified at a qualified
specialist workshop, e.g. an authorized
Mercedes-Benz Center.
Before changing a fuse
XSecure the vehicle against rolling away
(Ypage 100).
XSwitch off all electrical consumers.
XTurn the key to position 0in the ignition
lock and remove it (Ypage 87). All indica-
tor lamps in the instrument cluster must be off.
The fuses are located in various fuse boxes:
RFuse box in the front area
RFuse box in the glove compartment
Fuse box in the front area
Pay attention to the "Important safety notes"
(Ypage 173).
GWARNING
If the windshield wipers begin to operate
while the service cover is open, there is a
danger of injury from the wiper arms. There
is a risk of injury.
Always switch off the windshield wipers
and the ignition before opening the ser-
vice cover.
!Make sure that no moisture can enter the
fuse box when the cover is open.
!When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
seeping in or dirt could otherwise impair
the operation of the fuses.
XMake sure that the windshield wipers are
turned off.
XOpen the service cover (Ypage 151).
You can now see fuse box 0043.
Fuse box in the glove compartment
Fuse box
!Do not use a pointed object such as a
screwdriver to open the cover in the dash-
board. You could damage the dashboard or
the cover.
!Make sure that no moisture can enter the
fuse box when the cover is open.
!When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
Fuses173
>> Breakdown assistance.
Z

iThe actual values for tires are vehicle-
specific and may deviate from the values in
the illustration.
Checking the tire pressures
Important safety notes
Observe the notes on tire pressure
(Ypage 180).
Information on air pressure for the tires on
your vehicle can be found:
Ron the vehicle's Tire and Loading Informa- tion placard on the B-pillar
Rin the tire pressure table in the fuel filler
flap (Ypage 98)
Rin the "Tire pressure" section
Checking tire pressures manually
To determine and set the correct tire pres-
sure, proceed as follows:
XRemove the valve cap of the tire that is to bechecked.
XPress the tire pressure gauge securely onto
the valve.
XRead the tire pressure and compare it with
the recommended value on the Tire and
Loading Information placard (
Ypage 180).
XIf the tire pressure is too low increase the
tire pressure to the recommended value.
XIf the tire pressure is too high, release
air. To do this, press down the metal pin in
the valve using the tip of a pen, for exam-
ple. Then check the tire pressure again
using the tire pressure checker.
XScrew the valve cap onto the valve.
XRepeat these steps for the other tires.
Tire pressure monitor
General notes
iThis function is only available in the
USA.
If a tire pressure monitor is installed, the
vehicle's wheels have sensors that monitor
the tire pressures in all four tires. The tire
pressure monitor warns you if the pressure
drops in one or more of the tires. The tire pressure monitor only functions if the cor-
responding sensors are fitted to all wheels.
Important safety notes
GWARNING
Each tire, including the spare (if provi-
ded), should be checked at least once every
two weeks when cold and inflated to the
pressure recommended by the vehicle man- ufacturer on the Tire and Loading Informa-
tion placard on the driver's door B-pillar
or the tire pressure label on the inside of
the fuel filler flap. If your vehicle has
tires of a different size than the size indi-
cated on the Tire and Loading Information
placard or, if available, the tire pressure
label, you should determine the proper tire
pressure for those tires.
As an added safety feature, your vehicle has been equipped with a tire pressure moni-
toring system (TPMS) that illuminates a low
tire pressure telltale when one or more of
your tires are significantly underinflated.
Accordingly, when the low tire pressure
telltale lights up, you should stop and
check your tires as soon as possible, and
inflate them to the proper pressure. Driv-
ing on a significantly underinflated tire
causes the tire to overheat and can lead to
tire failure.
Underinflation also reduces fuel effi-
ciency and tire tread life, and may affect
the vehicle's handling and stopping abil-
ity. Please note that the TPMS is not a sub-
stitute for proper tire maintenance, and it
is the driver's responsibility to maintain
correct tire pressure, even if underinfla-
tion has not reached the level to trigger
illumination of the TPMS low tire pressure
telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate
when the system is not operating properly.
The TPMS malfunction indicator is com-
bined with the low tire pressure telltale.
When the system detects a malfunction, the
Tire pressure183
>> Wheels and tires.
Z

Tread
The part of the tire that comes into contact
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 prevent the tire from
coming loose 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 5 lbs (2.3 kilograms).
These optional extras, such as high-perform-
ance brakes, level control, a roof rack or a
high-performance battery, are not included
in the curb weight and the weight of the
accessories.
TIN (Tire Identification Number)
This is a unique identifier which can be used
by a tire manufacturer to identify tires, for
example for a product recall, and thus iden-
tify 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 of a tire.
Traction
Traction is the result of friction between the
tires and the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are dis-
tributed over the tire tread. If the tire tread
is level with the bars, the wear limit of 00CDin
(1.6 mm) has been reached.
Occupant distribution
The distribution of occupants in a vehicle at
their designated seating positions.
Total load limit
Nominal load and luggage load plus 68 kg
(150 lbs) multiplied by the number of seats in
the vehicle.
Changing a wheel
Flat tire
You can find information on what to do in the
event of a flat tire in the "Flat tire" section
(
Ypage 161).
Rotating the wheels
GWARNING
Never interchange the front and rear wheels
as they have different dimensions, e.g.
size, wheel offset etc. Otherwise, there
could be a negative effect on the road hold- ing and you could endanger yourself or oth-
ers.
!On vehicles equipped with a tire pressure
monitor, electronic components are loca-
ted in the wheel.
Tire-mounting tools should not be used
near the valve. This could damage the elec-
tronic components.
Only have tires changed at a qualified spe-
cialist workshop.
Various types of steel wheel can be fitted on
your vehicle. Some steel wheels have a red
mark in the hub cap area. The hub cap has to be
removed to see the red mark, see "Raising the
vehicle" in the "Wheel change" section
(
Ypage 197). When changing the wheels,
always fit wheels of the same type on all axles.
Always pay attention to the instructions and
safety notes when changing a wheel
(
Ypage 196).
The wear patterns on the front and rear tires
differ, depending on the operating condi-
tions. Front tires typically wear more on the
shoulders and the rear tires in the center.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is rotated. Check the tire pressure and reac-
tivate the tire pressure monitor if necessary.
196Changing a wheel
>> Wheels and tires.

Direction of rotation
Tires with a specified direction of rotation
have additional benefits, e.g. if there is a
risk of hydroplaning. These advantages can
only be gained if the tires are fitted corre-
sponding to the direction of rotation.
An arrow on the sidewall of the tire indicates
its correct direction of rotation.
Storing wheels
Store wheels that are not being used in a cool,
dry and preferably dark place. Protect the
tires from oil, grease, gasoline and diesel.
Mounting a wheel
Preparing the vehicle
XMake sure that you have the appropriate
tire-changing tools. For further informa-
tion inquire at any smart center.
XStop the vehicle on solid, non-slippery and
level ground.
XApply the parking brake (Ypage 101).
XBring the front wheels into the straight-
ahead position.
XVehicles with automatic transmission:
shift the transmission to position P.
XVehicles with manual transmission:
depress the clutch pedal fully and engage
first or reverse gear.
XSwitch off the engine.
XRemove the SmartKey from the ignition
lock.
XAlso secure the vehicle against rolling
away.
Securing the vehicle to prevent it from
rolling away
XOn level ground:place chocks or other suit-
able items under the front and rear of the
wheel that is diagonally opposite the wheel
you wish to change.
XOn light downhill gradients: place chocks
or other suitable items in front of the
wheels of the front and rear axle.
Raising the vehicle
GWARNING
If you do not position the jack correctly at
the appropriate jacking point of the vehi- cle, the jack could tip over with the vehicle
raised. There is a risk of injury.
Only position the jack at the appropriate
jacking point of the vehicle. The base of the jack must be positioned vertically,
directly under the jacking point of the
vehicle.
Changing a wheel197
>> Wheels and tires.
Z

Observe the following when raising the vehi-
cle:
Rmake sure you have a suitable jack and
wheel wrench. If used incorrectly, the jack
could tip over with the vehicle raised.
For further information inquire at any
smart center.
Rthe jack is designed only to raise and hold
the vehicle for a short time while a wheel
is being changed. It is not suited for per-
forming maintenance work under the vehi-
cle.
Ravoid changing the wheel on uphill and
downhill slopes.
Rbefore raising the vehicle, secure it from
rolling away by applying the parking brake
and inserting wheel chocks. Never disen-
gage the parking brake while the vehicle is
raised.
Rthe jack must be placed on a firm, flat and
non-slip surface. On a loose surface, a
large, flat load-bearing underlay must be
used. On a slippery surface, a non-slip
underlay must be used, e.g. rubber mats.
Rdo not use wooden blocks or similar objects
as a jack underlay. Otherwise, the jack will
not be able to achieve its load-bearing
capacity due to the restricted height.
Rmake sure that the distance between the
underside of the tires and the ground does
not exceed 1.2 in (3 cm).
Rnever place your hands and feet under the
raised vehicle.
Rdo not lie under the vehicle.
Rdo not start the engine when the vehicle is
raised.
Rdo not open or close a door or the tailgate
while the vehicle is raised.
Rmake sure that no persons are present in the
vehicle when the vehicle is raised.
!The jack is designed exclusively for
jacking up the vehicle at the jacking
points. Otherwise, your vehicle could be
damaged.
Steel wheel with hub cap
XVehicles with steel wheels and hub caps:
carefully reach into two of the hub cap
openings and remove the hub cap.
Steel wheel with hub cap
XVehicles with steel wheels and hub caps:
remove the hub cap.
XUsing wheel wrench 0043, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts com-
pletely.
198Changing a wheel
>> Wheels and tires.

The vehicle may only be raised at the desig-
nated jacking points on the sill.
The jacking points are located just behind
the wheel housings of the front wheels and
just in front of the wheel housings of the rear
wheels (arrows). You can identify the jacking
points by the triangular indentations on the
sill.
To avoid damage, position the jack centrally
under the triangular indentations.
XPosition jack 0044centrally under the tri-
angular indentations at the jacking points on the sill 0043.
Example
XMake sure the foot of the jack is directly
beneath the jacking point.
XRaise the vehicle with jack 0044until the
tire is a maximum of 1.2 in (3 centimeters)
off the ground.
Removing a wheel
!Do not place wheel bolts in sand or on a
dirty surface. The bolt and wheel hub
threads could otherwise be damaged when
you screw them in.
XUnscrew the wheel bolts.
XRemove the wheel.
Mounting a new wheel
GWARNING
Oiled or greased wheel bolts or damaged
wheel bolts/hub threads can cause the wheel
bolts to come loose. As a result, you could
lose a wheel while driving. There is a risk of accident.
Never oil or grease wheel bolts. In the event
of damage to the threads, contact a quali-
fied specialist workshop immediately.
Have the damaged wheel bolts or hub threads
replaced/renewed. Do not continue driv-
ing.
GWARNING
If you tighten the wheel bolts or wheel nuts when the vehicle is raised, the jack could
tip over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
Always pay attention to the instructions and
safety notes in the "Changing a wheel" sec-
tion (
Ypage 196).
Only use wheel bolts that are designed for the
wheel and the vehicle. For safety reasons,
smart recommends that you only use wheel
bolts which have been approved for smart
vehicles and the respective wheel.
!To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
Changing a wheel199
>> Wheels and tires.
Z