402 Practical hintsReplacing batteries in the SmartKey/SmartKey with KEYLESS-GO*If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced 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.
SmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1
(page 397).
1Mechanical key
2Battery compartment
Insert mechanical key 1 in side
opening and push gray slide.
Battery compartment2 is unlatched.
Pull battery compartment 2 out of the
SmartKey housing in direction of
arrow.
Warning!
G
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 re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.
403 Practical hints
Replacing batteries in the SmartKey/SmartKey with KEYLESS-GO*
Remove the batteries.
3Battery
4Contact spring
Using a lint-free cloth, insert new
batteries 3 under the contact
spring4 with the plus (+) side facing
up.
Return battery compartment 2 into
housing until it locks into place.
Slide mechanical key 1 back into the
SmartKey.
Check the operation of the SmartKey.
SmartKey with KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key (
page 397).
Insert the mechanical key in side open-
ing and push grey slide.
The battery compartment is unlatched.
Pull the battery compartment out of the
SmartKey housing.
1Battery
2Tilt battery up
3Mechanical key
Using mechanical key3, apply
pressure to position2.
Battery1 tilts up slightly.
Pull batteries1 out in direction of
arrow.
Using a lint-free cloth, insert new
batteries1 with the plus (+) side
facing up.
Return battery compartment into hous-
ing until it locks into place.
Slide mechanical key 3 back into the
SmartKey.
Check the operation of the SmartKey
and the KEYLESS-GO*.
