2015 SMART FORTWO COUPE coolant

No. Accessory/Component Amperage Color
E
CPC, shifter, brake force booster vacuum
pump 7.5 A Brown
F
Coolant pumps 1 and 2, high-voltage battery 15 A Blue
G
ESP
®
control unit 25 A Neutral
H
Exterior lamp switch, turn signal lamp
switch, cockpit switch module, on-board
diagnostics socket, exterior rear view mir-
ror heating, anti-theft warning system,
rain-light sensor, charge level and power
gauges, central locking system, instrument
cluster, Tire Pressure Monitoring System
(TPMS), brake and turn signal lamps (left and right) 10 A Red
I
— — —
J
— — —
K
Safety circuit high-voltage battery 15 A Blue
L
— — —
M
Rear window wiper (coupé only) 15 A Blue
N
ESP
®
control unit, EPS control unit, restraint
systems 10 A Red
O
Electric drive components, engine control
unit, transmission control unit, on-board
diagnostics socket, sound generator 7.5 A Brown
P
Air conditioning system, exterior rear view
mirror adjustment, washer pump, audio, seat
heating, wiper switch, cruise control, soft
top switch (cabriolet only), backup lamp 10 A Red
Q
Auxiliary power outlet 15 A Blue
R
Left low‑beam headlamp 7.5 A Brown
S
Right low‑beam headlamp 7.5 A Brown
T
— — —
U
Right high‑beam headlamp 7.5 A Brown
V
Left high‑beam headlamp 7.5 A Brown
W
Electric drive components 7.5 A Brown Fuses
209>> Practical hints. Z

No. Accessory/Component Amperage Color
X
Rear window defroster 40 A Orange
Y
Soft top (cabriolet only) 30 A Green
Z
Radiator cooling fan 40 A Orange
\
Horn, central locking system 20 A Yellow
^
— — —
_
Starter switch (ignition) 50 A Red
a
ESP
®
control unit 40 A Orange
©
EPS control unit 30 A Green
y
Exterior rear view mirror heating 7.5 A Brown
z
Brake lamps 7.5 A Brown
|
— — —
~
Tire pressure monitor control unit 7.5 A Brown
¡
Coolant pump, electric drive components, HV
interior PTC heater passenger compartment,
windshield unit car2go 10 A Red
¢
Audio, subwoofer, sound system, soft top
(cabriolet only) 15 A Blue
£
Interior lighting 5 A Light brown
¤
Surround sound system 20 A Yellow
¥
Seat heating control unit 25 A Neutral210
Fuses>> Practical hints.

Capacities
Components Capacity Coolants, lubricants, etc.
Coolant system approx. 6.9 US qt (6.5 l) Anticorrosion/Antifreeze meet-
ing specification MB 325.0
Air conditioning system 500 g
(17.6 oz) R134a refrigerant (never R 12)
120 g
(4.2 oz) PAG lubricant oil Daphne 1234
Windshield washer sys-
tem 4.0 US qt (3.8 l)
Windshield washer concentrate
13
(Y page 218)
Washer fluid mixing ratio
(Y page 218) Brake fluid
G
WARNING
During vehicle operation, the boiling
point of the brake fluid is continuously
reduced through the absorption of moisture from the atmosphere. Under extremely
strenuous operating conditions, this mois-
ture content can lead to the formation of
bubbles in the system, thus reducing the
system’s efficiency.
Therefore, the brake fluid must be replaced regularly. Refer to your vehicle’s Mainte-
nance Booklet for replacement interval.
Only brake fluid approved by smart is rec- ommended. Any authorized electric drive
smart center will provide you with addi-
tional information. Windshield/rear window washer system
During all seasons: X Use a windshield washer concentrate
labeled for summer and water for tem-
peratures above freezing point.
X Use a windshield washer concentrate
labeled for winter and water for temper-
atures below freezing point.
X Premix the windshield washer fluid in a
suitable container depending on the out-
side temperature and in accordance with
the manufacturer’s instructions 14
.
Washer fluid mixing ratio R
Temperature above 32¦ (0¥):
1 part windshield washer concentrate
labeled for summer to 100 parts water
R Temperature of 14¦ (-10¥):
1 part windshield washer concentrate
labeled for winter to 2 parts water
R Temperature of -4¦ (-20¥):
1 part windshield washer concentrate
labeled for winter to 1 part water
13 Use a windshield washer concentrate labeled for summer and water for temperatures above freezing
point or a windshield washer concentrate labeled for winter and water for temperatures below freezing
point.
14 Refer to the notes for use on the container. 218
Service fluids and capacities>> Technical data.

G
WARNING
Windshield washer concentrate is highly
flammable. Fire, naked flames and smoking
are prohibited when windshield washer
concentrate is being handled. Coolants
The battery and drive system coolant is a
mixture of water and anticorrosion/anti-
freeze, which provides: R Corrosion protection
R Freeze protection
R Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory with a coolant providing freeze protection
to approximately -35¦ (-37¥) and corro-
sion protection.
! Add premixed coolant solution only.
Adding water and MB 325.0 Anticorro-
sion/Antifreeze separately from each
other, could cause drive system damage
not covered by the smart Limited War-
ranty.
If the antifreeze mixture is effective to
-35¦ (-37¥), the boiling point of the
coolant in the pressurized cooling system
is reached at approximately 266¦ (130¥).
The coolant solution must be used year
round, even in countries which have high
temperatures to provide the necessary cor-
rosion protection and increase boil‑over
protection. Refer to Maintenance/ Service
Booklet for replacement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze solu-
tion or other smart approved products of
equal specification are used to renew the
coolant concentration or bring it back up
to the proper level. For information on other smart approved
products of equal specification, contact an
authorized electric drive smart center.
To provide important corrosion protec-
tion, the solution must be at least 50% anti-
corrosion/antifreeze (equivalent to freeze
protection to approximately -35¦
[-37¥]).
If you use a solution that is more than 55%
anticorrosion/antifreeze (freeze protec-
tion to approximately -49 ¦[(-45¥ ]), the
drive system and battery temperature will
increase due to the lower heat transfer
capability of the solution. Therefore, do
not use more than this amount of anticor-
rosion/antifreeze.
If the coolant level is low, water and
MB 325.0 Anticorrosion/Antifreeze should
be used to bring it up to the proper level
(have cooling system checked for signs of
leakage). Please make sure the mixture is
in accordance with label instructions.
Always use anticorrosion/antifreeze that
has been approved by smart. For informa-
tion contact an authorized electric drive
smart center.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water.
If you are not sure about the water quality, consult an authorized electric drive smart
center.
Capacities Cooling-system
capacity
All models approx. 6.9 US qt
(6.5 l)
Anticorrosion/antifreeze
Your vehicle contains a number of alumi-
num parts. The use of aluminum components
in motor vehicle drive systems necessi-
tates that anticorrosion/antifreeze cool- Service fluids and capacities
219>> Technical data. Z

ant used in such drive systems be specifi-
cally formulated to protect the aluminum
parts.
Failure to use such anticorrosion/anti-
freeze coolant will result in a signifi-
cantly shortened service life.
Therefore, the following product is
strongly recommended for use in your vehi- cle: MB 325.0 Anticorrosion/Antifreeze
agent.
Before the start of the winter season (or
once a year in hot southern regions), you
should have the anticorrosion/antifreeze
concentration checked.
The coolant is also regularly checked each
time you bring your vehicle to an author-
ized electric drive smart center for ser-
vice.
Anticorrosion/antifreeze quantity: Approximate freeze protection
-35¦
¦ (-37¥ ¥) -49¦
¦ (-45¥ ¥) Cooling system
approx. 3.5 US qt
(3.3 l) approx. 3.8 US qt
(3.6 l)220
Service fluids and capacities>> Technical data.