Page 671 of 761
670 Practical hints
Where will I find ...?
Minispare wheel
The Minispare wheel is stored in the com-
partment underneath the trunk floor.
1Minispare wheel with spare wheel bolts
in container on wheel rim
2Luggage bowl
3Vehicle tool kit, jack and collapsible
wheel chock
Removing the Minispare wheel
Turn luggage bowl2 counterclock-
wise.
Remove Minispare wheel1.Setting up the collapsible wheel chock
The collapsible wheel chock serves to
additionally secure the vehicle, e.g. while
changing the wheel.
1Tilt the plates upward
2Fold the lower plate outward
3Insert the plate
Tilt both plates upward1.
Fold the lower plate outward2.
Guide the tabs of the lower plate all the
way into the openings of the base
plate3.
For information on where to place wheel
chocks when changing a wheel, see “Lift-
ing the vehicle” (
page 687).
Page 672 of 761

671 Practical hints
Unlocking/locking in an emergency
Unlocking/locking in an emergency
Unlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey or KEYLESS-GO*, unlock the
driver’s door and the trunk using the me-
chanical key. Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in the direction of
arrow.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
Insert mechanical key2 into the driv-
er’s door lock until it stops.
Turn mechanical key2 counterclock-
wise to position 1 and hold it there.
Pull the door handle until the locking
knob moves up.
The driver’s door is unlocked.
Pull the door handle once more to open
the driver’s door.
iUnlocking the vehicle with the mechanical
key and opening the driver’s door or the trunk
with the mechanical key will trigger the anti-theft
alarm system (
page 81).
To cancel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the starter
switch.
1Unlocking
2Mechanical key
Page 673 of 761

672 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 6.0 ft
(1.8 m) is required to open the trunk lid.
Insert the mechanical key2 into the
trunk lid lock until it stops.
Turn mechanical key2 all the way
counterclockwise to position 1.
The trunk opens.
Turn the mechanical key2 back and
remove it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or KEYLESS-GO*, do the follow-
ing:
Close the front passenger door, the
rear right door and the trunk.
Open the driver’s door and the rear left
door.
Press the central locking switch on the
driver’s door (
page 343).
The locking knobs of the front passen-
ger door and the rear doors move
down.
If the vehicle battery is disconnected or
drained:
Press down the locking knobs of
the front passenger door and the
rear doors manually.
Exit the vehicle.
Check whether the trunk is locked.
If necessary, lock the trunk with the
mechanical key (
page 484).
Close the driver’s door.
Enter the vehicle through the rear left
door.
Press down the locking knob of the
driver’s door.
Exit the vehicle.
Close the rear left door.
The vehicle is locked.
1Unlocking in an emergency
2Mechanical key
!The trunk lid swings open upwards automat-
ically. Always make sure that there is sufficient
overhead clearance.
iIf you cannot close the trunk with the re-
mote trunk opening/closing* switch, lower the
trunk lid manually and close it with hands placed
flat on the trunk lid until it is engaged in its lock.
!To prevent inadvertent lockout, make sure
to have the SmartKey or SmartKey with
KEYLESS-GO* with you before proceeding with
the next step. The next step will lock the vehicle.
iThis procedure does not arm the anti-theft
alarm system nor does it lock the fuel filler flap.
Page 674 of 761

673 Practical hints
Unlocking/locking in an emergency
Mechanically releasing the electronic
parking brake
Depending on vehicle production date your
vehicle may be equipped with a mechani-
cal release device for releasing the elec-
tronic parking brake. It is located behind
the fuel filler flap next to the fuel cap.
1Protective cap
2Release tool
3Pulling
Shift the automatic transmission to P
(
page 399).
Prevent the vehicle from rolling away
by blocking a rear wheel with the wheel
chock. A wheel chock is included with
the vehicle tool kit (
page 668).
Open fuel filler flap.
Remove protective cap1.
Screw release tool2 from vehicle tool
kit clockwise 2 to 3 rotations onto re-
lease cable.
Pull release tool2 in direction of
arrow3.
The electronic parking brake is re-
leased. The red indicator lamp0
(USA only) or! (Canada only) flash-
es. The message “Parking brake See
Oper. Manual” appears on the multi-
function display.
Unscrew release tool2 from release
cable.
Reattach protective cap1.
Store release tool2 in vehicle tool kit.
After it has been unlocked, you can engage
the electronic parking brake again from
the driver’s seat.
Press the electronic parking brake han-
dle (
page 395).
iIf your vehicle is not equipped a mechanical
release device for releasing the electronic park-
ing brake contact Roadside Assistance or an au-
thorized Mercedes-Benz Center.
Warning!G
If you mechanically release the electronic
parking brake, the vehicle may start to move
on its own. Make sure that no one is in front
of or behind the vehicle. Otherwise, an acci-
dent could occur resulting in injury or fatali-
ty. Before releasing the electronic parking
brake, shift the automatic transmission to P
(
page 399) and secure your vehicle in
place using the chock from the vehicle tool
kit.
iIf the electronic parking brake is not re-
leased, pull the release tool again with more
force.
Page 675 of 761

674 Practical hints
Opening/closing in an emergency
Power tilt/sliding sunroof or panorama
roof with power tilt/sliding panel*
Depending on vehicle production date your
vehicle may be equipped with a crank to
open or close the tilt/sliding sunroof or
tilt/sliding panel manually should an elec-
trical malfunction occur.The drive mechanism is behind the left sun
visor.
1Cover
Remove cover1.
2Crank
Take crank2 from the Operator’s
Manual pouch.
Switch on the ignition.
Insert crank2 through the hole.
Turn crank2 clockwise to:
slide roof panel/sunroof closed
raise roof panel/sunroof at the rear
Turn crank2 counterclockwise to:
slide roof panel/sunroof open
lower roof panel/sunroof at the
rear
iIf your vehicle is not equipped with a crank
and you cannot open or close the tilt/sliding
sunroof or tilt/sliding panel due to a malfunction
contact Roadside Assistance or an authorized
Mercedes-Benz Center.
iTurn crank2 slowly and smoothly.
The tilt/sliding sunroof (
page 488) or tilt/slid-
ing panel (
page 492) must be synchronized af-
ter being operated manually.
Page 677 of 761

676 Practical hints
Replacing SmartKey batteries
If the batteries in the SmartKey/SmartKey
with KEYLESS-GO* are discharged, the ve-
hicle can no longer be locked or unlocked.
It is recommended to have the batteries re-
placed at an authorized Mercedes-Benz
Center.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey/SmartKey with
KEYLESS-GO* (
page 671).1Mechanical key
2Battery compartment
Insert mechanical key 1 into opening.
Press mechanical key 1 in direction of
arrow.
The battery compartment is unlatched.
Pull battery compartment 2 out of the
housing.
Warning!G
Batteries contain poisonous and corrosive
substances. Therefore keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make sure
they are clean and free of lint.
iWhen changing batteries, always replace
both batteries.
The required replacement batteries are available
at any authorized Mercedes-Benz Center.
Page 678 of 761
677 Practical hints
Replacing SmartKey batteries
3Batteries
4Contact springs
Pull out batteries3.
Using a line-free cloth, insert new bat-
teries 3 under contact springs 4 with
the positive terminal (+) side facing up.
Return battery compartment 2 into
housing until it locks into place.
Slide the mechanical key back into the
SmartKey/SmartKey with
KEYLESS-GO*.
Check the operation of the SmartKey/
SmartKey with KEYLESS-GO*.
Page 682 of 761

681 Practical hints
Replacing bulbs
1Cover 1
2Cover 2
3Cover 3
Removing and installing washer fluid
reservoir on left-hand side
Vehicles with Airmatic*
You must remove the washer fluid reser-
voir in order to change the bulbs of the
front headlamp on the left-hand side. The
washer fluid reservoir is on the front
left-hand side of the engine compartment.Washer fluid reservoir (example illustration
from S 550)
1Retaining screw
Removing
Turn retaining screw1 counterclock-
wise.
Take washer fluid reservoir out of
mounting.
Place washer fluid reservoir to the side
and do not disconnect any wires or ca-
bles.Installing
Guide washer fluid reservoir into
mounting so that the bottom retaining
lug slides into the rubber sleeve on the
longitudinal member.
Turn retaining screw1 clockwise.
Bi-Xenon headlamps
Warning!G
Do not remove the cover for the Bi-Xenon
headlamp. Because of high voltage in Xenon
lamps, it is dangerous to replace the bulb or
repair the lamp and its components. We rec-
o mm e nd that y ou ha ve s uc h wo rk do ne b y a
qualified technician.