Page 298 of 426
296 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
ú
(USA only)
±
(Canada only)
The yellow engine malfunction
indicator lamp comes on while
driving.
There is a malfunction in:
The fuel management
system
The ignition system
The emission control
system
Systems which affect
emissions
Such malfunctions may result
in excessive emissions values
and may switch the engine to
its limp-home (emergency
operation) mode.
Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics
system. It allows the accurate identifi-
cation of system malfunctions
through the readout of diagnostic
trouble codes. It is located in the front
left area of the footwell next to the
parking brake pedal.
Page 301 of 426
299 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
The yellow fuel tank reserve warning lamp
comes on while driving.
The fuel level has gone below the reserve
mark.
Refuel at the next gas station
(page 267).
<
The red seat belt telltale illuminates
for a brief period after starting the
engine.
The telltale reminds you to fasten seat belts.
Fasten your seat belt.
The telltale goes out.
1
The red SRS indicator lamp comes
on while driving.
There is a malfunction in the restraint sys-
tems. The air bags or emergency tensioning
device (ETDs) could deploy unexpectedly or
fail to activate in an accident.
Drive with added caution to the
nearest authorized Mercedes-Benz
Center.
Warning!
G
In the event a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you visit an autho-
rized Mercedes-Benz Center immediately to
have the system checked; otherwise the
SRS may not be activated when needed in
an accident, which could result in serious or
fatal injury, or it might deploy unexpectedly
and unnecessarily which could result in an
accident and/or injury to you or to others.
Page 328 of 426
326 Practical hintsUnlocking/locking in an emergencyUnlocking the vehicle
If you are unable to unlock the vehicle with
the SmartKey, open the driver’s door using
the mechanical key and the tailgate using
the emergency release.
Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in direction of
arrow.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
1Unlocking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key counterclock-
wise to position1.
The driver’s door is unlocked.Unlocking and opening the tailgate
A minimum height clearance of 6.40 ft
(1.95 m) is required to open the tailgate.
The emergency release is located on the
inside of the tailgate.
1Release lever
2CoveriUnlocking the driver’s door with the
mechanical key will trigger the
anti-theft alarm system*.
To cancel the alarm, do one of the
following:
Press buttonŒ or‹ on the
SmartKey
Insert the SmartKey in the starter
switch
Page 329 of 426
327 Practical hints
Unlocking/locking in an emergency
Remove cover2 from the trim on the
tailgate.
Push release lever1 all the way to the
right.
Lift the tailgate.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey, do the following:
Close the passenger doors and the
tailgate.
Press the central locking switch in the
center console (
page 96).
Check to see whether the locking
knobs on the passenger doors have
moved down.
If necessary push them down manually.
Except for the driver’s door, the vehicle
should now be locked.1Locking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.
!Always make sure there is sufficient
overhead clearance.iIf the vehicle has previously been
locked from the outside using the
SmartKey, opening the tailgate from
the inside will trigger the anti-theft
alarm system*.
To cancel the alarm, do one of the
following:
Press buttonŒ or‹ on the
SmartKey
Insert the SmartKey in the starter
switch
Page 330 of 426
328 Practical hintsUnlocking/locking in an emergencyFuel filler flap
In case the central locking system does
not release the fuel filler flap, you can open
it manually.
Open the tailgate.
Press button1.
Fold down trim panel2.
Reach inside through opening3 in
direction of arrow.
Turn release knob4 clockwise
(arrow).
The fuel filler flap can now be opened.
Manually unlocking the transmission
gear selector lever
In the case of power failure the transmis-
sion gear selector lever can be manually
unlocked, e.g. to tow the vehicle.
Slide out the swiveling cup holder
(page 236).1Tool
Insert a tool1 (e.g. flat blade
screwdriver) into the opening.
Perform the following two steps
simultaneously:
Press tool1 forward in the
direction of arrow.
Move gear selector lever from
positionP.
Remove tool1 from the opening.
Warning!
G
If you operate the emergency release
button, be careful of the sharp edges so that
you do not injure yourself.
iThe gear selector lever is locked again
when moving it to positionP.
Page 331 of 426
329 Practical hints
Opening/closing in an emergency
Opening/closing in an emergency
Power tilt/sliding sunroof*
You can open or close the tilt/sliding
sunroof manually should an electrical
malfunction occur.
The tilt/sliding sunroof drive is located
behind the lens1 of the interior overhead
light.
Remove SmartKey from the starter
switch.
Pry off lens1 using a flat blade
screwdriver.
Slide both locking tabs2 in direction
of the arrows.
Lower the rear of the cover and
remove.
Remove the cover.
Take the crank3 out of the Operator’s
Manual pouch.
Insert crank3 through hole on the left
side.
Turn crank3 clockwise to:
slide sunroof closed
raise sunroof at the rear
Turn crank3 counterclockwise to:
slide sunroof open
lower sunroof at the rear
iDo not disconnect electrical
connectors.
iTurn crank3 slowly and smoothly.
The tilt/sliding sunroof must be
synchronized after being operated
manually (
page 222).
Page 380 of 426
378 Technical dataFuels, coolants, lubricants, etc.Switching fuels
For best performance and driveability it is
recommended to use either one or the
other fuel. A refueling pattern that
alternates between the two different fuels
should be avoided if possible.
When switching fuels, make sure:
Fuel level is below half full.
Fuel level is above reserve (fuel reserve
warning lamp is not lit).
Amount of added fuel is more than
5gallons (20liters).
Ignition is off during refill.
Immediately after refueling engine is
started and operated for at least five
minutes.
These precautions and recommendations
are supposed to prevent any difficulties
when starting and operating the engine
which otherwise may be experienced
before the engine has fully adapted to the
different fuel.If in spite of these recommendations the
engine does not perform properly, adding
more gasoline [at least 3 gallons
(12 liters)] to the fuel may improve the
engine behavior.
Cold weather performance
It is possible that starting times will signif-
icantly increase at temperatures
below 32°F (0°C). At low temperatures
the use of a block heater (Canada only) is
recommended (see an authorized
Mercedes-Benz Center for further
information). Rough idling may also be
experienced at such temperatures before
the engine is fully warmed up.Hot weather performance
At ambient temperatures above 95°F
(35°C) start times may increase and be
accompanied by a rough idle following the
start.
Cruising range
E85 fuel contains less energy per gallon
than gasoline. To make sure that engine
performance with ethanol fuel is similar to
that when using gasoline, the engine must
burn more ethanol fuel. As a result, it is to
be expected that the fuel consumption will
increase when using E85 compared to
gasoline operation.
Maintenance
Please inform your Mercedes-Benz Center
if you use or have used E85 fuel when your
vehicle is delivered for maintenance or
repairs.
!E85 fuel is unsuitable for use when
ambient temperatures fall below 14°F
(-10°C).
iUse of E85 may reduce your driving
range.
Page 387 of 426
385 Technical terms
ABS
(A
ntilock B
rake S
ystem)
Prevents the wheels from locking up
during braking so that the vehicle can
continue to be steered.
Alignment bolt
Metal pin with thread. The centering
pin is an aid used when changing a tire
to align the wheel with the wheel hub.
BabySmart
TM1
air bag deactivation
system
This system detects if a special system
compatible child restraint seat is
installed on the front passenger seat.
The system will automatically deacti-
vate the passenger front air bag when
such a seat is properly installed
(the56indicator lamp located
in the center console comes on). See
an authorized Mercedes-Benz Center
for availability.BabySmart
TM compatible child seats
Special restraint system for children.
The sensor system for the passenger
seat prevents deployment of the
passenger front air bag if a
BabySmartTM compatible child seat is
installed.
BAS
(B
rake A
ssist S
ystem)
System for potentially reducing braking
distances in emergency braking
situations. The system is activated
when it senses an emergency based on
how fast the brake is applied.
Bi-Xenon headlamps*
Headlamps which use an electric arc as
the light source and produce a more
intense light than filament headlamps.
Bi-Xenon headlamps produce low
beam and high beam.CAC
(C
ustomer A
ssistance C
enter)
Mercedes-Benz customer service
center, which can help you with any
questions about your vehicle and
provide assistance in the event of a
breakdown.
CAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control
vehicle functions such as door locking
or windshield wiping depending on
vehicle settings and/or ambient
conditions.
Cockpit
All instruments, switches, buttons and
indicator/warning lamps in the
passenger compartment needed for
vehicle operation and monitoring.
1BabySmart
TM is a trademark of Siemens
Automotive Corp.
