490 OperationAt the gas station
Take off fuel filler cap and set it in di-
rection of arrow 2 in the recess on the
inside of fuel filler flap 4.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.
Only fill your tank until the filler nozzle
unit cuts out – do not top up or over-
fill.
Replace fuel cap by turning it clockwise
until it audibly engages.
Close the fuel filler flap.
Check regularly and before a long tripExample illustration from S 5501Coolant level
2Brake fluid
3Windshield washer and headlamp
cleaning system
Warning!
G
Overfilling of the fuel tank may create pres-
sure in the system which could cause a gas
discharge. This could cause the gas to spray
back out when removing the fuel pump noz-
zle, which could cause personal injury.
i
Only use premium unleaded gasoline with a
minimum Posted Octane Rating of 91 (average of
96 RON/86 MON).
Information on gasoline quality can normally be
found on the fuel pump.
More information on gasoline can be found in the
Factory Approved Service Products pamphlet.
i
Leaving the engine running and the fuel cap
open can cause the yellow engine malfunction
indicator lamp ± to illuminate.
For more information, see the “Practical hints”
section (
page 547).
i
Opening the hood (
page 492).
492 OperationEngine compartmentHood
Opening1Release lever
Pull release lever 1.
The hood is unlocked.
2Handle for opening the hood
Lift the hood slightly.
Handle2 will extend out of the radia-
tor grille.
Pull handle 2 to its stop out of radiator
grille.
Lift bottom of hood at edge of radiator
grille.
The hood will be automatically held
open at shoulder height by gas-filled
struts.
Warning!
G
Do not pull the release lever while the vehi-
cle is in motion. Otherwise the hood could
be forced open by passing air flow.
This could cause the hood to come loose
and injure you and others.Warning!
G
You could be injured when the hood is open
– even when the engine is switched off.
Parts of the engine can become very hot. To
prevent burns, only touch the components
described in the Operator’s Manual and
comply with all relevant safety precautions.
!
To avoid damage to the windshield wipers or
hood, never open the hood if the wiper arms are
folded forward away from the windshield.
!
To avoid damage to handle2 never pull up
the hood on handle2.
493 Operation
Engine compartment
Closing
Let the hood drop from a height of ap-
proximately 1 ft. (30 cm).
The hood will lock audibly.
Check to make sure the hood is fully
closed.
If you can raise the hood at a point
above the headlamps, then it is not
properly closed. Open it again and let it
drop with somewhat greater force.
Warning!
G
To help prevent personal injury, stay clear of
moving parts when the hood is open and the
engine is running. Make sure the hood is
properly closed before driving. When closing
the hood, use extreme caution not to catch
hands or fingers.
The radiator fan may continue to run for ap-
proximately 30 seconds or even restart af-
ter the engine has been turned off. Stay
clear of fan blades.Warning!
G
If you see flames or smoke coming from the
engine compartment, or if the coolant tem-
perature gauge indicates that the engine is
overheated, do not open the hood. Move
away from vehicle and do not open the hood
until the engine has cooled down. If neces-
sary, call the fire department.
Warning!
G
The engine is equipped with a transistorized
ignition system. Because of the high voltage
it is dangerous to touch any components (ig-
nition coils, spark plug sockets, diagnostic
socket) of the ignition system
with the engine running
while starting the engine
if ignition is “on” and the engine is
cranked manually
Warning!
G
Be careful that you do not close the hood on
anyone.
Make sure that the hood is securely en-
gaged before driving off. Do not continue
driving if the hood can no longer engage af-
ter an accident, for example. The hood could
otherwise come loose while the vehicle is in
motion and endanger you and others.
496 OperationEngine compartmentTo check the engine oil level with the oil
dipstick, do the following:
Open the hood (
page 492).
S 5501Oil dipstick
2Upper mark
3Lower mark
Pull out oil dipstick1.
Wipe oil dipstick1 clean.
Fully insert oil dipstick1 into the dip-
stick guide tube.
Pull out oil dipstick1 again after ap-
proximately 3 seconds to obtain accu-
rate reading.The oil level is correct when it is between
lower mark3 (min.) and upper mark2
(max.) mark of the oil dipstick.
If necessary, add engine oil.
For adding engine oil (
page 496).
For more information on engine oil, see the
“Technical data” section (page 661) and
(
page 663).
For more information on messages in the
multifunction display concerning engine
oil, see the “Practical hints” section
(page 602).Adding engine oil
i
The 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
(U.S. vehicles) or FSS PLUS (Canada vehicles).
For a listing of approved engine oils and oil fil-
ters, refer to the Factory Approved Service Prod-
ucts 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 Main-
tenance 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 vehicles) will result in engine
damage not covered by the Mercedes-Benz Lim-
ited Warranty.
Warning!
G
Parts of the engine can become very hot. To
prevent burns, only touch the components
described in the Operator’s Manual and
comply with all relevant safety precautions.
497 Operation
Engine compartment
Example illustration from S 5501Filler 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, see the
“Technical data” section (
page 661) and
(
page 663).
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 automatic transmission.Active Body Control* (ABC*) fluid level
Regular fluid level check is not required. If
you notice fluid leaks or malfunction mes-
sages in the multifunction display, have an
authorized Mercedes-Benz Center check
the ABC-system.
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze. To check
the coolant level, the vehicle must be
parked on level ground and the engine
must be cool.
!
Excess oil must be siphoned or drained off.
It will cause damage to the engine and catalytic
converter not covered by the Mercedes-Benz
Limited Warranty.
Warning!
G
In order to avoid any possibly serious burns:
Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature gauge indi-
cates that the coolant is overheated.
Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.
540 OperationVehicle careCleaning the windows and the wiper
blades
Make sure the hood is fully closed.
Place wiper arms in vertical position
(page 627).
Make sure the vehicle’s on-board elec-
tronics have status 0 (
page 315).
Fold the wiper arms forward until they
snap into place.
Clean the wiper blade inserts with a
clean cloth and detergent solution.
Use a soft, clean cloth and a mild win-
dow cleaning solution on all outside
and inside glass surfaces.
An automotive glass cleaner is recom-
mended.
!
If the windshield wipers leave smears on the
windshield after the vehicle has been driven
through an automatic car wash, wax or other res-
idue is on the windshield. Clean the windshield
with washer fluid shortly after cleaning the car in
an automatic car wash (
page 352).
!
The windshield wipers must be in a vertical
position before folding them away from the wind-
shield. They could otherwise damage the hood.
Never open the hood when the wiper arms are
folded forward.
Warning!
G
For safety reasons, switch off wipers and re-
move SmartKey from starter switch (vehi-
cles with KEYLESS-GO*: Make sure the
vehicle’s on-board electronics have
status0) before cleaning the windshield
and/or the wiper blades. Otherwise, the
wiper motor could suddenly turn on and
cause injury.!
While doing so, only touch the wiper arm so
as not to damage the wiper blade inserts.
!
Fold the windshield wiper arms back onto
the windshield before turning the SmartKey in
the starter switch or pressing the KEYLESS-GO*
start/stop button (vehicles with KEYLESS-GO*).
Hold on to the wiper when folding the wiper arm
back. If released, the force of the impact from
the tensioning spring could crack the windshield.
!
To clean the window interior, do not use a
dry cloth, abrasives, solvents or cleaners con-
taining solvents. Do not touch the inside of the
front, rear or side windows with hard objects
such as an ice scraper or ring. Doing so may
damage the windows.
561 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
DISTRONIC PLUS
inoperative
DISTRONIC Plus* is malfunctioning.
Visit an authorized Mercedes-Benz Center as soon as possible.
DISTRONIC PLUS
passive
You have depressed the accelerator pedal,
DISTRONIC Plus* is no longer controlling
the speed of the vehicle.
Release the accelerator pedal.
USA only:
DISTRONIC PLUS
- - - mph
Canada only:
DISTRONIC PLUS
- - - km/h
You have attempted to activate DISTRONIC
Plus* at a speed below 20 mph (30 km / h)
without the vehicle in front being displayed
in the multifunction display (
page 385).
Drive faster than 20 mph (30 km / h) and activate DISTRONIC
Plus* again.
ESP
® is deactivated.
Activate ESP
® (page 72).
The automatic transmission is in position P,
R or N.
Shift the automatic transmission toD (
page 367).
The system is overheated.
Wait until the system cools down.
The vehicle is secured in place by the elec-
tric parking brake.
Release electric parking brake (
page 364).
The driver’s door is open and the drivers
seat belt is unbuckled.
Close the driver’s door and fasten your seat belt.
The hood is open.
Close the hood (
page 493).
588 Practical hintsWhat to do if …?
During severe operating conditions,
e.g. stop-and-go traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display
Possible cause/consequence
Possible solution
Coolant level
Stop vehicle!
Switch engine off
The coolant is too hot.
Stop the vehicle in a safe location or as soon
as it is saf e to do so and imm ediat ely turn of f
the engine.
Only start the engine again after the message
disappears. You could otherwise damage the
engine.
Observe the coolant temperature gauge in
the instrument cluster (
page 28).
Warning!
G
Driving when your engine is overheated
can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously
burned.
Steam from an overheated engine can
cause serious burns which can occur
just by opening the engine hood. Stay
away from the engine if you see or hear
steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
!
The engine should not be operated with the
coolant temperature above 248°F (120°C). Do-
ing so may cause serious engine damage which
is not covered by the Mercedes-Benz Limited
Warranty.