Page 345 of 417
344 Practical hintsReplacing SmartKey batteriesIf the batteries in the SmartKey are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized 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.
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.
Page 346 of 417
345 Practical hints
Replacing SmartKey batteries
SmartKey
Remove the mechanical key out of the
SmartKey (
page 342).
1Mechanical key
2Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Insert the mechanical key1in side
opening and push gray slide.
The battery compartment is unlatched.
Pull battery compartment2 out of the
housing in direction of arrow.
Remove the batteries.3Battery
4Contact spring
Using a lint-free cloth, insert new
batteries3 under the contact
spring4 with the plus (+) side facing
up.
Return battery compartment into hous-
ing until it locks into place.
Slide mechanical key1 back into the
SmartKey.
Check the operation of the SmartKey.
iWhen inserting the batteries, make
sure they are clean and free of lint.iWhen replacing batteries, always re-
place both batteries. The required re-
placement batteries are available at
any Mercedes-Benz Center.
Page 347 of 417

346 Practical hintsReplacing bulbsSafe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all
times.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. See an authorized
Mercedes-Benz Center for headlamp ad-
justment.
iIf the headlamps are fogged up on the
inside as a result of high humidity, driv-
ing the vehicle a distance should clear
up the fogging.iSubstitute bulbs will be brought into
use when lamps malfunction. Observe
the messages in the multifunction dis-
play (
page 323).
!You must not change the bulbs or LEDs
yourself, as you could damage the vehi-
cle lighting systems.
Have blown bulbs or LEDs replaced by
an authorized Mercedes-Benz Center.iIf one of the following bulbs blows, an-
other bulb will adopt its function:
Rear turn signals
Brake lamps
Side lamps
Tail lamps
Page 348 of 417
347 Practical hints
Replacing bulbs
Front lamps
Rear lamps
Lamp
Type
1
Additional turn signals
LEDs
2
Turn signals
PY, 21 W
3
Side marker lamp
WY 5 W
4
Parking lamps
W5W
5
Low and high beam
lamp
D2S, 35 W
6
High beam flasher
H7, 55 W
7
Front fog lamps
H3, 55 W
Lamp
Type
8
Brake/parking lamp
LEDs
9
Turn signal lamp
LEDs
a
Side marker lamp
P 21 W
b
High mounted brake
lamp
LEDs
c
License plate lamp
C 5 W
d
Rear fog lamp
P 21 W
e
Back up lamp
P 21 W
f
Reflector
-
Page 349 of 417

348 Practical hintsReplacing the wiper bladesRemoving wiper blades
Remove the SmartKey from starter
switch.
Fold the wiper arm forward.
You must feel the wiper arm engage in
position.
Set the wiper blade at 90° to the wiper
arm.
Slide the wiper blade out in direction of
arrow.
Installing wiper blades
Position the wiper blade at 90° to the
wiper arm.
Slide the wiper blade onto the wiper
arm.
Fold the wiper blade parallel to the
wiper arm.
Fold the wiper arm backward to rest on
the windshield. Make sure you hold on
to the wiper when folding the wiper arm
back.
Warning!
G
For safety reasons, remove SmartKey from
starter switch before replacing a wiper
blade. Otherwise the motor could suddenly
turn on and cause injury. !The hood must be opened
(page 243) before folding the wiper
arms away from the windshield. You
could otherwise damage the hood
and/or the wiper arm.
!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.
Do not allow the wiper arms to contact
the windshield glass without a wiper
blade inserted.
Make sure the wiper blades is properly
installed. Improperly installed wiper
blades may cause windshield damage.
For your convenience, we recommend
that you have this work carried out by
an authorized Mercedes-Benz Center.
Page 350 of 417

349 Practical hints
Flat tire
Flat tire
The vehicle is equipped with the TIREFIT
kit.Preparing the vehicle
Park the vehicle as far as possible from
moving traffic on a hard surface.
Turn on the hazard warning flashers.
Turn the steering wheel so that the
front wheels are in a straight ahead po-
sition.
Set the parking brake.
Move the gear selector lever to P.
Turn off the engine (
page 58).
Remove the SmartKey from the starter
switch.
Open the driver’s door.
Have any passenger exit the vehicle at
a safe distance from the roadway.
Sealing tires with TIREFIT kit
Small tire punctures, particularly those in
the tread, can be sealed with TIREFIT.
TIREFIT can be used in ambient tempera-
tures down to -4°F (-20°C).
Foreign objects (e.g. screws or nails)
should not be removed from the tire.
Take TIREFIT, the sticker, and the elec-
tric air pump out of the trunk.
!A wheel change should only be carried
out at an authorized Mercedes-Benz
Center. Otherwise there is a danger of
damaging the vehicle by jacking it up
incorrectly.
iOpen door only when conditions are
safe to do so.Warning!
G
Keep TIREFIT away from sparks, open flame
or heat source.
Do not smoke.
Warning!
G
TIREFIT is a limited repair device. TIREFIT
cannot be used for cuts or punctures larger
than approximately 0.16 in (4 mm) and tire
damage caused by driving with extremely
low tire inflation pressure, or on a flat tire, or
a damaged wheel.
Do not drive the vehicle under such circum-
stances.
Contact your nearest Mercedes-Benz
Center for assistance or call Roadside
Assistance. !After using TIREFIT, the tire inflation
pressure sensor may have to be re-
placed.
Page 351 of 417

350 Practical hintsFlat tire
Attach the sticker where it will be easily
seen by the driver on the instrument
cluster.
1TIREFIT container
2Flap
3Notch
4Electrical plug
5Air hose
6Flange
Open flap 2 on the electric air pump.
Pull plug4 and air hose5 out of the
pump housing.
Screw the air pump’s air hose5 onto
flange6 of the TIREFIT container.
Stick TIREFIT container1 upside
down into notch3 of the electric air
pump.
Warning!
G
Take care not to allow the contents of
T I R E F I T t o c o m e i n c o n t a c t w i t h h a i r , e y e s o r
clothing. TIREFIT is harmful if inhaled, swal-
lowed or absorbed through the skin - causes
skin, eye and respiratory irritation.
Any contact with eyes or skin should be
flushed immediately with plenty of water.
If clothing comes in contact with TIREFIT,
change clothing as soon as possible.
In case of allergic reaction or rash, consult a
physician immediately.
Warning!
G
Keep TIREFIT out of reach of children.
If swallowed, rinse mouth immediately with
plenty of water and drink plenty of water.
Do not induce vomiting!
Consult a physician immediately.
Keep away from open flame or heat source.iIf sealant has leaked out, let it dry. You
can then peel it off.
Page 352 of 417

351 Practical hints
Flat tire
7Tire valve
8Electric air pump switch
9Air hose with pressure gauge and vent
screw
aFiller hose
Unscrew the valve cap from tire
valve7.
Screw filler hosea onto tire valve7.
Insert electrical plug4 into vehicle
cigarette lighter socket.
Turn the SmartKey in the starter switch
to position1 (
page 40).
PressI on electric air pump switch8.
The electric air pump should now
switch on and inflate the tire.After five minutes, the pressure gauge
must display at least 26 psi (1.8 bar). The
air hose can become hot during inflation.
Please exercise appropriate caution.
If this tire inflation pressure is not at-
tained, turn off the electric air pump,
detach the filler hose from the tire
valve, and drive vehicle back and forth
very slowly approximately 30 ft (10 m).
This serves to better distribute the
TIREFIT sealant material inside the tire.
Unscrew the air pump’s air hose5
from flange6 of the TIREFIT
container.
Screw air hose5onto tire valve7.
Inflate the tire again.
Warning!
G
Observe safety instructions on air pump
label.
!Do not operate the electric air pump
longer than six minutes without inter-
ruption. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.