Page 300 of 474

299 Operation
Engine compartment
Pull out oil dipstick1 again after 
approximately 3 seconds to obtain 
accurate reading.
The oil level is correct when it is be-
tween the lower (min) mark3 and 
upper (max) mark2 of oil dipstick1.
If necessary, add engine oil.
For adding engine oil, see “Adding 
engine oil” (
page 299).
For more information on engine oil, see 
“Fuels, coolants, lubricants, etc.” 
(
page 451).
For more information on messages in the 
multifunction display concerning engine 
oil, see the “Practical hints” section 
(
page 360).Adding engine oil
SLK 350 (example illustration)
1Filler cap
SLK 55 AMG
1Filler cap
iThe filling quantity between the upper and 
lower marks on the oil dipstick is approximately 
2.1 US qt. (2.0 l).
!Only use approved engine oils and oil filters 
required for vehicles with Maintenance System. 
For a listing of approved engine oils and oil 
filters, refer to the Factory Approved Service 
Products pamphlet (USA only) 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, or changing of oil and oil 
filter at change intervals longer than those called 
for by the Maintenance System will result in 
engine or emission control system damage not 
covered by the Mercedes-Benz Limited 
Warranty. 
     
        
        Page 346 of 474

345 Operation
Vehicle care
Plastic and rubber parts
Use a gentle dishwashing detergent or 
mild detergent for delicate fabrics as a 
washing solution.
Wipe with a cloth moistened in a luke-
warm solution.
The surface may temporarily change 
color. If this is the case, wait for it to 
dry.Hard plastic trim items
Use Mercedes-Benz approved Interior 
Care, a soft, lint-free cloth and apply 
with light pressure.Steering wheel and gearshift/gear 
selector lever
Wipe with a damp cloth and dry 
thoroughly or clean with 
Mercedes-Benz approved Leather 
Care.
Carpets
Use Mercedes-Benz approved Carpet 
and Fabric Care for cleaning the 
carpets.
Headliner
Use a soft bristle brush or a 
dry-shampoo cleaner in case of 
excessive dirt. 
Warning!G
Do not use cleaners or cockpit care sprays 
containing solvents to clean the cockpit or 
the steering wheel. Cleaners containing 
solvents will make the surface porous and 
vehicle occupants could suffer serious 
injuries from plastic parts coming loose in 
the event of air bag deployment.
!Do not use oil, wax or scouring agents on 
these parts. 
Never apply strong force and only use a soft, 
non-scratching cloth when cleaning the surface. 
Do not attempt to wipe the surface with a dry 
cloth or sponge.
Otherwise you may scratch or damage the 
surface.
!Never apply strong force and only use a soft, 
non-scratching cloth when cleaning the surface. 
Do not attempt to wipe the surface with a dry 
cloth or sponge.
Otherwise you may scratch or damage the 
surface. 
     
        
        Page 454 of 474

453 Technical data
Fuels, coolants, lubricants, etc.
Engine oils
Engine oils are specifically tested for 
their suitability in our engines and durabil-
ity for our service intervals. Therefore, only 
use approved engine oils and oil filters 
required for vehicles with 
Maintenance System. For a listing of ap-
proved engine oils and oil filters, refer to 
the Factory Approved Service Products 
pamphlet (USA only), or contact an 
authorized Mercedes-Benz Center.Engine oil additivesAir conditioning refrigerant
R-134a (HFC) refrigerant and special 
PAG lubricating oil are used in the air con-
ditioning system.
!Using engine oils and oil filters of specifica-
tion other than those expressly required for the 
Maintenance System, or changing of oil and oil 
filter at change intervals longer than those called 
for by the Maintenance System will result in 
engine or emission control system damage 
not covered by the Mercedes-Benz Limited 
Warranty.
Please follow Maintenance System recommen-
dations for scheduled oil changes. Failure to do 
so will result in engine or emission control 
system damage not covered by the 
Mercedes-Benz Limited Warranty.
!Do not blend oil additives with engine oil. 
They may damage the engine. Damage or mal-
functions resulting from blending oil additives 
are not covered by the Mercedes-Benz Limited 
Warranty.
!Never use R-12 (CFC) or mineral-based 
lubricating oil, otherwise damage to the system 
will occur.