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Practical hints
Unlocking/locking in an emergency
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
1 Mechanical key
2 Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
̈ Remove mechanical key 1
(
୴ page 348).
̈ Insert the mechanical key 1 in side
opening and push gray slide.
The battery compartment is unlatched.
̈ Pull the battery compartment 2 out of
the SmartKey housing in direction of
arrow.
̈ Remove the 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 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 authorized
Mercedes-Benz Center.