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Practical hints
Replacing SmartKey batteries
If the batteries in the SmartKey are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced 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
Replacement batteries: Lithium, type
CR 2025 or equivalent.
̈ Remove the mechanical key from the
SmartKey (
୴ page 361).
1 Mechanical key
2 Battery compartment
̈ Insert mechanical key 1 into the
opening.
̈ Press mechanical key 1 in direction of
arrow.
The battery compartment 2 is un-
latched.
̈ Pull battery compartment 2 out of the
housing.
3 Batteries
4 Contact spring
̈ Remove the batteries 3.
̈ Using a lint-free cloth, insert new
batteries 3 under the contact
springs 4 with the positive terminal
(+) side facing up.
̈ Return battery compartment 2 into
housing until it locks into place.
̈ Slide mechanical key 1 back into the
SmartKey.
̈ Check the operation of the SmartKey.
Warning! G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
i
When inserting the batteries, make sure
they are clean and free of lint.
i
When replacing batteries, always replace
both batteries of both SmartKeys.
The required replacement batteries are available
at any Mercedes-Benz Center.