SMART forfour - Notes

Engine oil viscosity
Viscosity describes the flow characteris-
tics of a fluid. If an engine oil has a high
viscosity rating,
it flows slowly; the lower
the viscosity, the faster it flows.
Engine oil selection is based on the
respective outside temperatures and in
accordance with the SAE classification
(viscosity). The table shows you which SAE
classifications are to be used. The low-
temperature properties of engine oils can
be significantly impaired during opera-
tion due to, for example, ageing or soot and
fuel accretion. It is therefore strongly
recommended to observe regular oil
changes using an approved engine oil with
the appropriate SAE classification.
Brake fluid
When handling brake fluid, observe the
important safety
notes on service products
(Y page 268).
The brake fluid change intervals can be
found in the Service Booklet.
Only use brake fluid approved by
Mercedes-Benz according to MB Approval
331.0.
Information about approved brake fluid
can be obtained at any qualified special-
ist workshop or on the Internet at:
http://bevo.mercedes-benz.com.
i
Have the brake fluid regularly replaced
at a qualified specialist workshop and
the replacement confirmed in the Ser-
vice Booklet.
Coolant
General notes
!
Only add
coolant that has been premixed
with the desired antifreeze protection.
You could otherwise damage the engine.
Further information on coolants can be
found in the Mercedes-Benz Specifica-
tions for Service Products, MB Specifi-
cations for Service Products 310.1, e.g.
on the Internet at
http://bevo.mercedes-benz.com. Or con-
tact a qualified specialist workshop.
!
Always use a suitable coolant mixture,
even in countries where high tempera-
tures prevail.
Otherwise, the engine cooling system is
not sufficiently protected from corro-
sion and overheating.
i
Have the coolant regularly replaced at a
qualified specialist workshop and the
replacement confirmed in the Service
Booklet.
Comply with the important safety precau-
tions for service products when handling
coolant (Y page 268).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs
the following tasks:
R
corrosion protection
R
antifreeze protection
R
raising the boiling point
If antifreeze/corrosion inhibitor is pres-
ent in the correct concentration, the boil-
ing point of the coolant during operation
will be approximately 130 †.
272
Service products and capacities
>> Technical data.