546 Technical dataFuels, coolants, lubricantsEngine oils
Engine oils are specifically tested for their 
suitability in our engines and durability for 
our service intervals. Therefore, only use 
approved engine oils and oil filters re-
quired for vehicles with Maintenance 
System (U.S. vehicles) or FSS PLUS (Cana-
da vehicles). For a listing of approved en-
gine oils and oil filters, refer to the Factory 
Approved Service Products pamphlet, or 
contact an authorized Mercedes-Benz 
Light Truck Center.
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 Mercedes-Benz Limited Warranty.Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG 
lubricating oil are used in the air condition-
ing system.
Never use R-12 (CFC) or mineral-based lu-
bricating oil. Otherwise damage to the 
system will occur.
Brake fluid
Only brake fluid approved by 
Mercedes-Benz is recommended. Your 
authorized Mercedes-Benz Light Truck 
Center will provide you with additional in-
formation.
!
Using engine oils and oil filters of 
specification other than those expressly 
required for the Maintenance System 
(U.S. vehicles) or FSS PLUS (Canada vehicles), 
or changing of oil and oil filter at change intervals 
longer than those called for by the Maintenance 
System (U.S. vehicles) or FSS PLUS (Canada ve-
hicles) will result in engine or emission control 
system damage not covered by the 
Mercedes-Benz Limited Warranty.Please follow Maintenance System 
(U.S. vehicles) or FSS PLUS (Canada vehicles) 
recommendations for scheduled oil changes. 
Failure to do so could result in engine or 
emission control system damage not covered by 
the Mercedes-Benz Limited Warranty.
Warning!
G
During vehicle operation, the boiling point of 
the brake fluid is continuously reduced 
through the absorption of moisture from the 
atmosphere. Under extremely strenuous op-
erating conditions, this moisture content 
can lead to the formation of bubbles in the 
system, thus reducing the system’s efficien-
cy.
Therefore, the brake fluid must be replaced 
regularly. Refer to your vehicle’s 
Maintenance Booklet for replacement inter-
val.
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