378 Practical hintsReplacing SmartKey batteriesIf the batteries in the SmartKey are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized 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.Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make
sure they are clean and free of lint.
When replacing batteries, always re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.
379 Practical hints
Replacing SmartKey batteries
SmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key
(page 374).
1Mechanical key
2Battery compartment
Insert mechanical key1 in side open-
ing and push gray slide.
Battery compartment2 is unlatched.
Pull battery compartment2 out of the
housing in direction of arrow.
Remove the discharged batteries.
3Battery
4Contact spring
Using a lint-free cloth, insert new
batteries3 under contact spring4
with the plus (+) side facing up.
Return battery compartment2 into
the housing until it engages.
Slide mechanical key1 back into the
SmartKey.
Check the operation of the SmartKey.
