Mercedes-Benz E-Class 2009 Owner's Manual page 278

i
Remove the key if you park the vehicle
and do not require any electrical consum-
ers. The vehicle will then use very little
energy, thus conserving the battery.
i
If the battery is discharged, you must use
the emergency key element to unlock the
vehicle.
Disconnecting the battery
G
Risk of accident
If the battery is disconnected:
the brake boosting effect will not be avail-
R
able. Greater braking force will then be
required and brake pedal travel will be lon-
ger. If necessary, depress the brake pedal
with maximum force.
the transmission is locked in position P on
R
vehicles with automatic transmission*
! Always disconnect the battery in the
order described below. Never mix up the
terminal clamp disconnection/connection
order and never mix up the terminal
clamps. You may otherwise damage the
vehicle electronics.
Firmly depress the parking brake and on
X
vehicles with automatic transmission*,
shift the transmission to position P.
Switch off all electrical consumers (e.g.
X
radio, blower, etc.).
Turn the key to 0 (
X
Y
lock and remove it or make sure that no
ignition position has been selected with
KEYLESS GO*. In the instrument cluster, all
of the indicator lamps must be out.
Open the bonnet.
X
* optional
page 65) in the ignition
Release clamps ; on filter box :.
X
Remove filter box :.
X
Remove the negative terminal clamp from
X
the battery.
Remove the cover from the positive termi-
X
nal clamp.
Remove the positive terminal clamp from
X
the battery.
Disconnect the breather hose.
X
Removing the battery
Disconnect the battery (
X
Loosen the bolt which holds the battery in
X
place.
Remove the battery.
X
Charging and fitting the battery
G Risk of injury
Battery acid is caustic. Avoid contact with the
skin, eyes or clothing.
Charging the battery
G
Risk of injury
Only charge the battery in a well-ventilated
area. As the battery is being charged, gases
can escape and generate minor explosions.
This could injure you and other persons or
cause damage to the paintwork or acid cor-
rosion on the vehicle.
Battery
275
page 275).
Y
Z