higher boiling point, even in countries with high
outside temperatures.
Check the antifreeze/corrosion inhibitor con-
centration in the coolant every six months.
The percentage of corrosion inhibitor/anti-
freeze additive in the engine cooling system
should:
R
Be at least 50%. This way, the engine cooling
system is protected against freezing down to
approximately -35 ‡ (-37 †).
R
Not exceed 55% (antifreeze protection down
to -49 ‡ [-45 †]). Otherwise, heat will not be
dissipated as effectively.
Mercedes-Benz recommends an antifreeze and
corrosion inhibitor that meets the requirements
in the Mercedes-Benz Specifications for Service
Products Sheet Number 325.
More information can be obtained at any quali-
fied specialist workshop.
Operating fluid: coolant
Product name/number
Zerex G40-91, The Valvoline Company
MB Sheet No. 325.5
Maintenance interval
Have the coolant renewed every 15 years.
Capacities
Engine cooling system
Coolant
Approx. 11 US qt
(10.4 l)
Climate control system refrigerants
Important safety notes
The climate control system of your vehicle is fil-
led with the refrigerant R
‑
134a.
The warning label for the refrigerant being used
can be found on the radiator cross member.
!
Only the refrigerant R
‑
134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved for
R-134a refrigerant. Otherwise, the climate
control system may be damaged.
Maintenance work such as adding refrigerant or
replacing components may only be carried out
by a qualified specialist workshop. All applicable
regulations thereto and the SAE standard J639
need to be respected.
All work on the climate control system should
always be carried out at qualified specialist
workshop.
Refrigerant warning label
Refrigerant warning label (example)
:
Warning symbols
;
Refrigerant capacity
=
Applicable standards
?
Part number PAG oil
A
Type of refrigerant
The warning symbols
:
refer to:
R
possible dangers
R
the implementation of maintenance work at a
qualified specialist workshop
Capacities
Front-compartment
air-conditioning
system
Capacity
Refrigerant
21.2 oz
(600 g)
PAG oil
2.8 oz
(79 g)
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Service products and capacities
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