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Practical hints
Unlocking/locking in an emergency
1 Mechanical key
2 Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
̈ Remove mechanical key 1
(
୴ page 305).
̈ Insert mechanical key 1 in side
opening and push grey slide.
Battery compartment 2 is unlatched.
̈ Pull battery compartment 2 out of the
SmartKey housing in direction of
arrow.
3 Battery
4 Contact spring
̈ Remove the batteries.
̈ Using a lint-free cloth, insert new
batteries under contact spring 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.
i
When changing batteries, always
replace both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.
i
When inserting the batteries, make
sure they are clean and free of lint.