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Replacing SmartKey batteries
306
1
Reset tool
2
Active head restraint cushion
3
Rectangular opening
X
Take reset tool 1 out of the Mercedes-
Benz literature pouch.
X
Guide reset tool 1 into rectangular open-
ing 3 between active head restraint cush-
ion 2 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 cush-
ion 2 backward towards the head
restraint cover in direction of arrow 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 57).
For information on head restraint adjustment,
see “Seats” (Y page 84).
Replacing SmartKey batteries
If 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 authorized Mer-
cedes-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 han-
dling and regard for the environment.
Check with your local government’s dis-
posal guidelines. California residents, see
http://www.dtsc.ca.gov/Hazardous-
Waste /Perchlorate/index.cfm.
Batteries contain materials that can harm the
environment if disposed of improperly. Recy-
cling of batteries is the preferred method of
disposal. Many states require sellers of bat-
teries to accept old batteries for recycling.
Practical hints