Resetting Activated Head Restraints; Replacing Smartkey Batteries - Mercedes-Benz 2009 C-Class Operator's Manual

Resetting activated head restraints

If the active head restraints have been
triggered in a rear-end collision, the active
head restraints must be reset.
You can tell that the active head restraints
have been triggered when they have been
moved forward and cannot be adjusted.
G Warning!
For safety reasons, have the active head
restraints checked at an authorized
Mercedes-Benz Center after a rear-end
collision.
G Warning!
When pushing back the head restraint
cushion, make sure your fingers do not
become caught between the head restraint
cushion and the cover. Failing to do so may
lead to injury.
i Pressing the head restraint cushion back
requires high force. If you encounter
difficulties when pushing the head restraint
back, please have the procedure
performed at an authorized Mercedes-Benz
Center.
Fold back
1
Push back
2
Push down
3
X
Push the head restraint cushion by the
bottom, back as far as it will go 2.
X
Push the head restraint cushion down into
the guide as far as it will go 3.
X
Fold the head restraint cushion by the top,
back firmly until it engages 1.
X
Repeat this procedure on the active head
restraint for the second front seat.
For information on active head restraints, see
"Active head restraints" ( Y page 57).
For information on head restraint adjustment,
see "Seats" ( Y page 86).
Practical hints

Replacing SmartKey batteries

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
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