663 Technical data
Fuels, coolants, lubricants, etc.
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
required 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
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-
Never use R-12 (CFC) or mineral-based lu-
bricating oil. Otherwise damage to the
system will occur.
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
Only brake fluid approved by
Mercedes-Benz is recommended. Your au-
thorized Mercedes-Benz Center will pro-
vide you with additional information.
Using engine oils and oil filters of
specification other than those expressly re-
quired 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 damage not covered
by the Mercedes-Benz Limited Warranty.
Please follow Maintenance System
(U.S. vehicles) or FSS (Canada vehicles) recom-
mendations for scheduled oil changes. Failure to
do so will result in engine damage not covered by
the Mercedes-Benz Limited Warranty.
Under extremely strenuous operating condi-
tions, this moisture content can lead to the
formation of bubbles in the system, thus re-
ducing the system’s efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle's Mainte-
nance Booklet for replacement interval.