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Practical hints
Unlocking/locking in an emergency
Changing batteries
If the batteries in the SmartKey or the KEY-
LESS-GO* card are discharged, the vehicle
can no longer be locked or unlocked. It is
recommended to have the batteries re-
placed at an authorized Mercedes-Benz
Center.
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 297).
̈ Insert the mechanical key 1 in side
opening and push gray slide 2.
The battery compartment is unlatched.
̈ Pull the battery compartment out of the
key 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.
Warning! G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
i
When changing batteries, always re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.