Page 301 of 474

300 OperationEngine compartmentAdding engine oil
1Filler cap
Unscrew filler cap1 from filler neck.
Add engine oil as required. Be careful 
not to overfill with oil.
Be careful not to spill any oil when adding. 
Avoid environmental damage caused by oil 
entering the ground or water.
Screw filler cap1 back on filler neck.
For more information on engine oil, see the 
“Technical data” section (
page 440) and 
(
page 442).
Transmission fluid level
The transmission fluid level does not need 
to be checked. If you notice transmission 
fluid loss or gear shifting malfunctions, 
have an authorized Mercedes-Benz Center 
check the transmission.
!Only use approved engine oils and oil 
filters required for vehicles with 
Maintenance System (U.S. vehicles) or 
FSS (Canada vehicles). For a listing of 
approved engine oils and oil filters, 
refer to the Factory Approved Service 
Products pamphlet in your vehicle 
literature portfolio, or contact an 
authorized Mercedes-Benz Center.
Using engine oils and oil filters of 
specification other than those 
expressly required for the Maintenance 
System (U.S. vehicles) or FSS (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 (Canada 
Vehicles) will result in engine damage 
not covered by the Mercedes-Benz 
Limited Warranty.
!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty. 
     
        
        Page 443 of 474

442 Technical dataFuels, coolants, lubricants, etc.Engine 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 
required for vehicles with Maintenance 
System (U.S. vehicles) or FSS (Canada 
vehicles). For a listing of approved engine 
oils and oil filters, refer to the Factory Ap-
proved Service Products pamphlet, or con-
tact an authorized Mercedes-Benz 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 
conditioning system.
Never use R-12 (CFC) or mineral-based 
lubricating oil. Otherwise damage to the 
system will occur.
Brake fluid
During vehicle operation, the boiling point 
of the brake fluid is continuously reduced 
through the absorption of moisture from 
the atmosphere. 
Only brake fluid approved by 
Mercedes-Benz is recommended. An 
authorized Mercedes-Benz Center will 
provide you with additional information.
!Using engine oils and oil filters of 
specification other than those express-
ly required for the Maintenance System 
(U.S. vehicles) or FSS (Canada vehi-
cles), or changing of oil and oil filter at 
change intervals longer than those 
called for by the Maintenance System 
(U.S. vehicles) or FSS (Canada Vehi-
cles) will result in engine damage not 
covered by the Mercedes-Benz Limited 
Warranty.
Please follow Maintenance System 
(U.S. vehicles) or FSS (Canada vehi-
cles) recommendations for scheduled 
oil changes. Failure to do so will result 
in engine damage not covered by the 
Mercedes-Benz Limited Warranty.
Warning!
G
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. 
     
        
        Page 451 of 474

450 Technical termsControl system
The control system is used to call up 
vehicle information and to change 
component settings. Information and 
messages appear in the multifunction 
display. The driver uses the buttons on 
the multifunction steering wheel to 
navigate through the system and to 
adjust settings.
Cruise control
Driving convenience system that 
automatically maintains the vehicle 
speed set by the driver.
Curb weight
(
page 331)
DOT
(Department o
f Transportation) 
(
page 331)Engine number
The number set by the manufacturer 
and placed on the cylinder block to 
uniquely identify each engine 
produced.
Engine oil viscosity
Measurement for the inner friction 
(viscosity) of the oil at different temper-
atures. The higher the temperature an 
oil can tolerate without becoming thin, 
or the lower the temperature it can 
tolerate without becoming viscous, the 
better the viscosity.
ESP
®(Electronic S
tability P
rogram)
Improves vehicle handling and 
directional stability.
ETD
(E
mergency T
ensioning D
evice)
Device which deploys in certain frontal 
and rear collisions exceeding the 
system’s threshold to tighten the 
seat belts.
->SRSFSS (Canada vehicles)
(F
lexible S
ervice S
ystem)
Maintenance service indicator in the 
multifunction display that informs the 
driver when the next vehicle mainte-
nance service is due. FSS evaluates 
engine temperature, oil level, vehicle 
speed, engine speed, distance driven 
and the time elapsed since your last 
maintenance service, and calls for the 
next maintenance service accordingly. 
GAWR
(G
ross A
xle W
eight R
ating) 
(
page 331)
Gear range
Number of gears which are available to 
the automatic transmission for shifting. 
The automatic gear shifting process 
can be adapted to specific operating 
conditions using the gear selector 
lever.