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Practical hints
Replacing SmartKey batteries
3 Battery
4 Contact spring
̈ Using a lint-free cloth, insert new
batteries 3 under the contact
spring 4 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*
1 Battery
2 Tilt battery up
3 Mechanical key
̈ Remove mechanical key out of the
SmartKey (
୴ page 383).
Replacement battery: Lithium, type
CR 2025 or equivalent.
̈ Insert the mechanical key 3 in side
opening and push gray slide.
The battery compartment is unlatched.
̈ Pull the battery compartment out of the
SmartKey housing.
̈ Using mechanical key 3, apply pres-
sure to position 2.
Battery 1 tilts up slightly.
̈ Pull out battery 1 in direction of ar-
row.
̈ Using a lint-free cloth, insert the new
battery with the plus (+) side facing up.
̈ Return battery compartment into hous-
ing until it locks into place.
̈ Slide mechanical key 1 back into the
SmartKey.
̈ Check the operation of KEYLESS-GO*.
i
When inserting the battery, make sure
they are clean and free of lint.
i
The required replacement battery is
available at any authorized
Mercedes-Benz Center.