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345 Practical hints
Unlocking in an emergency
Unlocking the driver’s door
If you can no longer lock or unlock the
doors using the SmartKey, unlock the driv-
er’s door using the emergency release
catch.The emergency release catch is located on
the left side in the trunk.
1Emergency release catch
Unlock the trunk (
Pull emergency release catch1.
The door is unlocked.
Open the door in the normal way.
Notify an authorized Mercedes-Benz
iUnlocking the driver’s door with the
emergency release catch will trigger
the anti-theft alarm system.
To cancel the alarm, insert the
SmartKey in the starter switch.
iIf it still is not possible to unlock the
door, pull more firmly on the emergen-
cy release catch.
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346 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
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
Batteries contain poisonous and corrosive
substances. Therefore keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
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.
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347 Practical hints
Replacing SmartKey batteries
2Unlocking the battery compartment
3Removing the battery compartment
Insert mechanical key1in side
opening, push gray slide4 in direction
The battery compartment is unlatched.
Pull battery compartment2 out of the
housing in direction of arrow3.5Battery
Remove the discharged batteries.
Using a lint-free cloth, insert new
batteries5 under the contact
spring6 with the plus (+) side facing
Return battery compartment into hous-
ing until it locks into place.
Slide mechanical key1 back into the
Check the operation of the SmartKey.
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348 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
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-
!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 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-
iIf one of the following bulbs blows, an-
other bulb will adopt its function:
Rear turn signals
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349 Practical hints
Additional turn signal
PY, 21 W
Side marker lamp
WY 5 W
Low and high beam
D2S, 35 W
High beam flasher
H7, 55 W
Front fog lamp
H3, 55 W
Turn signal lamp
Side marker lamp
P 21 W
High mounted brake
License plate lamp
C 5 W
Rear fog lamp
P 21 W
P 21 W