Page 327 of 399
327 Practical hints
Unlocking/locking in an emergency
Unlocking/locking in an emergency
Unlocking the vehicle
In case of a malfunction in the central lock-
ing system, you can unlock the trunk sepa-
rately (
page 88).
Unlocking the driver’s door
If you are unable to unlock the driver’s
door using the SmartKey, open the door
using the mechanical key.
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in the direction of
the arrow and slide mechanical key2
out of the housing.
3Unlocking
4Locking
Unlock the door with the mechanical
key. To do so, push the mechanical key
in the lock until it stops and turn it to
the left4.
iUnlocking your vehicle with the me-
chanical key will trigger the anti-theft
alarm system. To cancel the alarm, do
one of the following:
Press button Œor ‹on the
SmartKey.
Insert the key in the starter switch.
Page 337 of 399
337 Practical hints
Replacing wiper blades
Replacing wiper blades
Replacing wiper blades
Removal
Turn key in starter switch to position1.
Turn combination switch to wiper
settingII (
page 47).
With wiper arm in the vertical position
(see above), turn key in starter switch
to position0.
Fold the wiper arm forward.You should hear it snap into place.
Turn the wiper blade at a right angle to
wiper arm.
Slide the wiper blade sideways out of
the retainer.Installation
Slide wiper blade onto wiper arm until
it locks in place.
Rotate wiper blade into position paral-
lel to wiper arm.
Fold wiper arm back so that blade rests
on windshield.
!To avoid damage to the hood, the wiper
arms should only be folded forward
when in the vertical position.Warning!
G
For safety reasons, remove key from starter
switch before replacing a wiper blade, other-
wise the motor could suddenly turn on and
cause injury.
!Never open the hood when the wiper
arm is folded forward.
Do not allow the wiper arms to contact
the windshield glass without a wiper
blade inserted.
For your convenience, we recommend
that you have this work carried out by
an authorized Mercedes-Benz Center.
Page 339 of 399
339 Practical hints
Flat tire
On whee l to b e c hang ed, l oose n but d o
not yet remove the wheel bolts (ap-
proximately one full turn with wrench).
The jack take-up brackets are located di-
rectly behind the front wheel housing and
in front of the rear wheel housing. 1Jack take-up bracket
2Jack
3Crank
Position jack2 on firm ground under
the respective jack take-up bracket1.Make sure that the foot of the jack is di-
rectly under the take-up bracket so that it
is always vertical (plumb-line) as seen from
the side, even if the vehicle is parked on an
incline
Turn crank3 until the tire is a maxi-
mum of 1.2 in (3 cm) off the ground.
Never start engine while vehicle is
raised.
always vertical (plumb line) when in use, es-
pecially on hills. Always try to use the jack
on level surface. Be sure that the jack arm is
fully seated in the jack take-up bracket. Al-
ways lower the vehicle onto sufficient ca-
pacity jackstands before working under the
vehicle.
Page 340 of 399
340 Practical hintsFlat tire
Removing the wheel
1Alignment bolt
Unscrew the upper-most wheel bolt
and remove.
Replace this wheel bolt with alignment
bolt1 supplied in the tool kit.
Remove the remaining bolts.
Remove the wheel.Mounting the Minispare wheel
Clean contact surfaces of wheel and
wheel hub.
Guide the spare wheel onto the align-
ment bolt and push it on.
Insert wheel bolts and tighten them
slightly.
Warning!
G
Position the jack only on the jack take-up
brackets designed for this purpose.
If the jack is not properly positioned, the ve-
hicle may slip off of the jack.Warning!
G
The jack is intended only for lifting the vehi-
cle briefly for wheel changes. It is not suited
for performing maintenance work under the
vehicle. Never lie down under the raised ve-
hicle. Do not start the engine when the vehi-
cle is raised.
!Do not place wheel bolts in sand or dirt.
This could result in damage to the bolt
and wheel hub threads.
!To avoid paint damage, place wheel flat
against hub and hold it there while in-
stalling first wheel bolt.
Page 343 of 399
343 Practical hints
Batteries
Batteries
Your vehicle is equipped with two batter-
ies:
Auxiliary battery (back-up battery; en-
ables vehicle to shut down electrical
systems in a controlled manner should
the main battery fail; auxiliary battery is
located in the engine compartment)
The main battery (battery for starter
and electrical consumers; located in
the trunk).The main battery is in the trunk under the
luggage box. Remove the luggage box
(
page 325).
Main battery in trunk1Negative terminal
2Positive terminalWarning!
G
Jump starting must only be done using the
main battery in the trunk.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
Page 344 of 399
344 Practical hintsBatteries
Disconnecting the battery
Depress the parking brake firmly or
move the gear selector lever to
positionP.
Open the trunk (
page 261).
Disconnect battery negative lead1.
Remove cover2 from the positive ter-
minal.
Disconnect the battery positive lead.
Removing the battery
Remove the screw-nuts securing the
battery.
Remove the battery bracket.
Take out the battery.
Charging and reinstalling the battery
Charge battery in accordance with the
instructions of the battery charger
manufacturer.
Reinstall the charged battery. Follow
the previously described steps in re-
verse order.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the key is in the starter switch. Oth-
erwise the alternator and other elec-
tronic components could be severely
damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Contact your authorized
Mercedes-Benz Center for further infor-
mation.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
Warning!
G
With a disconnected battery
the brake boosting effect is not avail-
able.
You need more power to brake and
brake pedal travel is increased. If neces-
sary, you must depress the brake pedal
with full power.
you can no longer turn the ignition key
or, in cars with KEYLESS-GO*, pressing
the KEY-LESS-GO button* on the gear
selector lever has no effect.
the gear selector lever is locked in
position P.
Page 346 of 399
346 Practical hintsJump starting
Jump starting
If the battery is discharged, the engine can
be started with jumper cables and the bat-
tery of another vehicle. Observe the follow-
ing:
Jump starting should only be performed
when the engine and catalytic convert-
er are cold.
Do not start the engine if the battery is
frozen. Let the battery thaw out first.
Only jump start from batteries with the
same voltage rating.
Use only jumper cables with sufficient
cross-section, insulated terminal
clamps and polarity reversal protec-
tion.
Warning!
G
Failure to follow these directions will cause
damage to the electronic components, and
can lead to a battery explosion and severe
injury or death.
Never lean over batteries while connecting
or jump starting, you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water, and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and very explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
Read all instructions before proceeding.
iJumper cables with polarity reversal
protection are available at any autho-
rized Mercedes-Benz Center.
!Jump starting may only be performed
on the main battery installed in the
trunk.
Avoid repeated and lengthy starting at-
tempts.
Do not attempt to start the engine us-
ing a battery quick charge unit.
If the engine does not run after several
unsuccessful starting attempts, have it
checked at the nearest authorized
Mercedes-Benz Center.
Excessive unburned fuel generated by
repeated failed starting attempts may
damage the catalytic converter.
Make sure the jumper cables do not
have loose or missing insulation.
Make sure the cable clamps do not
touch any other metal part while the
other end is still attached to a battery.
Page 347 of 399
347 Practical hints
Jump starting
The battery is located in the trunk on the
right hand side underneath the luggage
box (
page 325). Only jump start the ve-
hicle from the battery in the trunk.
Make sure that the two vehicles do not
touch.
Turn off all electrical consumers.
Apply parking brake.
Shift selector lever to positionP.1Positive terminal of charged battery
2Positive terminal of discharged battery
3Vehicle ground
4Negative terminal of charged battery
Connect positive terminals1 and2 of
the batteries with the jumper cables.
Clamp cable to charged battery1 first.
Start engine of the vehicle with the
charged battery and run at idle speed.
Connect negative terminal4 of the
charged battery and vehicle ground3
(lock ring of the trunk lid lock) in the
trunk with the jumper cable. Clamp ca-
ble to charged battery4 first.
Start the engine of the disabled vehi-
cle.
Now you can again turn on the electrical
consumers. Do not turn on the lights under
any circumstances.
Remove the jumper cables first from
vehicle ground3 and negative
terminal4 and then from positive
terminals1 and2.
Have the battery checked at the next
authorized Mercedes-Benz Center.
Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 266).
iThe message
Malfunction - electric
consumers switched off
may appear
in the instrument cluster. It will disap-
pear as soon as the battery is suffi-
ciently charged.
!Vehicles with automatic transmission:
Do not tow-start the vehicle.
