Page 175 of 314

Engine compartment
174
>> Operation Adding engine oil
!
Only use approved engine oils and oil fil
ters required for vehicles with Maintenance
System. For a listing of approved engine oils
and oil filters contact an authorized smart
center.
Using engine oils and oil filters of specifica
tion other than those expressly required for
the Maintenance System, or changing of oil
and oil filter at change intervals longer than
those called for by the Maintenance System
will result in engine or emission control sys
tem damage not covered by the smart Limited
Warranty.The filler cap is located in the engine
compartment on the passenger side.
1
Filler cap
>Unscrew filler cap
1
from filler neck.
>Add engine oil as required.
Do not add more than 0.53 US qt (0.5 l)
engine oil at a time.
>Wait one minute until the engine oil has run
into the oil pan.
>Check the engine oil level once more.
>Add engine oil once more if necessary.
G
Warning!
When adding engine oil, always use a fun
nel to avoid spilling oil on any hot parts
such as the catalytic converter or ex
haust system.
If this should happen, however, the en
gine must be thoroughly cleaned before
you continue your trip. The engine oil
could otherwise ignite.P01.00285231
Page 305 of 314

Service fluids and capacities
304
>> Technical data.
Components
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
All models
approx. 3.5 US qt (3.3 l)
Approved engine oils
Transmission
All models
2.4 US qt (2.3l)
BOT328
Brake system
All models
1.05 US qt (1.0 l)
Brake fluid (DOT 4+)
Cooling system
All models
approx. 4.5 US qt (4.3 l)
Anticorrosion/Antifreeze meeting specification MB 325.0
Fuel tank
All models
8.72 US gal (33.0 l)
Premium unleaded gasoline:
including a reserve of
All models
1.32 US gal (5.0 l)
Minimum Posted Octane 91 (Afvg. of 96 RON/86 MON)
Air conditioning system*
All models
R134a refrigerant and special PAG lubricant oil (never R12)
Windshield washer system
All models
4.0 US qt (3.8 l)
Windshield washer concentrate
1
1 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. Follow suggested mixing ratios (
page 308).
Page 306 of 314

Service fluids and capacities
>> Technical data.
305 Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
engine oils and oil filters required for vehi
cles with Maintenance System. For a listing of
approved engine oils and oil filters contact an
authorized smart center.!
Using engine oils and oil filters of specifi
cation other than those expressly required
for the Maintenance System, or changing of oil
and oil filter at change intervals longer than
those called for by the Maintenance System
will result in engine or emission control
system damage not covered by the smart
Limited Warranty.
Please follow Maintenance System recommen
dations for scheduled oil changes. Failure to
do so will result in engine or emission control
system damage not covered by the smart
Limited Warranty.
Engine oil additives!
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by the
smart Limited Warranty. Any authorized smart
center will provide you with additional infor
mation.
Air conditioning refrigerantR134a (HFC) refrigerant and special PAG
lubricating oil are used in the air conditioning
system.!
Never use R12 (CFC) or mineralbased
lubricating oil. Otherwise damage to the sys
tem will occur.
Brake fluidOnly brake fluid approved by smart is recom
mended. Any authorized smart center will
provide you with additional information.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 condi
tions, this moisture content can lead to
the formation of bubbles in the system,
thus reducing the system’s efficiency.
Therefore, the brake fluid must be re
placed regularly. Refer to your vehicle’s
Maintenance Booklet for replacement
interval.