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Practical hints
Replacing SmartKey batteries
SmartKey with KEYLESS-GO*
Replacement battery: Lithium, type
CR 2025 or equivalent.
̈ Remove the mechanical key
(
୴ page 385).
̈ Take the battery compartment out of
the SmartKey housing (
୴ page 389).
1 Battery
2 Tilt battery up
3 Mechanical key
̈ 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 under the contact spring with
the plus (+) side facing up.
̈ Return the battery compartment into
the housing until it locks into place.
̈ Slide mechanical key 1 back into the
SmartKey, see “SmartKey”
(
୴ page 389).
̈ Check the operation of the SmartKey
with KEYLESS-GO.
i
When replacing batteries, always re-
place both batteries. The required re-
placement batteries are available at
any authorized Mercedes-Benz Center.