Jump-Starting - Mercedes-Benz A Series Owner's Manual

Practical advice

Jump-starting

G Risk of injury
Battery acid is caustic. Avoid contact with
the skin, eyes or clothing.
!
Only charge the installed battery with a
battery charger which has been tested and
approved by Mercedes-Benz. These battery
chargers allow the battery to be charged
while it is still installed. However, the bat-
tery must always be disconnected first.
!
Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
Charge the battery. Observe the notes in
X
the operating instructions for your battery
charger.
Refit the charged battery.
X
To do this, follow the steps described in
"Removing the battery" ( page 265) in
Y
reverse order.
266
Reconnecting the battery
!
Always reconnect the battery in the
sequence described below. Never swap the
terminal clamps. You may otherwise dam-
age the vehicle electronics.
Switch off all electrical consumers.
X
Connect the positive terminal clamp and
X
secure the cover.
Connect the negative terminal clamp.
X
Connect the breather hose. Make sure that
X
a cell cap is fitted on the side.
i
If the battery power supply has been inter-
rupted (e.g. if it has been reconnected), you
must carry out the following tasks:
set the time ( page 109).
R
Y
reset the function for folding the exterior
R
mirrors in/out automatically* by folding
the mirrors out once ( page 72).
Y
reset the side windows (
R
Y
Jump-starting
If your vehicle's battery is discharged, the
engine can be jump-started from another
vehicle or from an external battery using jump
leads.
Observe the following points:
Jump-starting may only be performed when
R
the engine and catalytic converter are cold.
Do not start the engine if the battery is fro-
R
zen. Let the battery thaw first.
Jump-starting may only be performed from
R
batteries with a nominal voltage of 12 V.
Only use jump leads which have a sufficient
R
cross-section and insulated terminal
clamps.
i
Jump leads and further information about
jump-starting can be obtained from any
Mercedes-Benz Service Centre.
page 85)
!
Avoid repeated and lengthy starting
attempts.
Never start the vehicle using a rapid battery
charger.
* optional