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Practical hints
Unlocking/locking in an emergency
̈ Using a lint-free cloth, insert new bat-
teries under the contact spring with the
plus (+) side facing up.
̈ Return battery compartment into hous-
ing until it locks into place.
SmartKey with KEYLESS-GO*
1 Battery
2 Tilt battery up
3 Mechanical key
Replacement batteries: Lithium, type
CR 2025 or equivalent.
̈ Remove mechanical key (୴ page 353).
̈ 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 in direction of ar-
row.
̈ Using mechanical key 3 apply pres-
sure to position 2.
Battery 1 tilts up slightly.
̈ Pull out batteries 1 in direction of ar-
row.
̈ Using a lint-free cloth, insert new bat-
teries with the plus (+) side facing up.
̈ Return battery compartment into hous-
ing until it locks into place.
i
When changing batteries, always re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.