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Replacing SmartKey batteries
330
1
Reset tool
2
Rectangular opening
3
Press head restraint cushion
X
Take reset tool 1 out of the Mercedes-
Benz literature pouch.
X
Guide reset tool 1 into rectangular
opening 2 between active head restraint
cushion and head restraint cover.
X
Press reset tool 1 downward in direction
of arrow until you hear the head restraint
release mechanism audibly engage.
X
Pull out reset tool 1.
X
Firmly press the active head restraint
cushion backward towards the head
restraint cover in direction of arrow 3 until
it engages.
X
Repeat this procedure for the second front
seat.
X
After resetting the active head restraints
store reset tool 1 in the Mercedes-Benz
literature pouch.
For information on active head restraints, see
“Active head restraints” (Y page 56).
For information on head restraint adjustment,
see “Seats” (Y page 84).
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.
G
Warning!
Batteries contain poisonous and corrosive
substances. Therefore, keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
immediately.
G
Warning!
SmartKey batteries contain perchlorate
material, which may require special
handling and regard for the environment.
Check with your local government’s
disposal guidelines. California residents,
see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Batteries contain materials that can harm the
environment if disposed of improperly.
Recycling of batteries is the preferred method
of disposal. Many states/provinces require
Practical hints