BMW SERIE 5 SPORT WAGON 2004 Owner's Manual page 194

Jump-starting
When your battery is discharged you can
use two jumper cables to start your vehicle
with power from the battery in a second
vehicle. You can also use the same method
to help start another vehicle.Use only
jumper cables with fully-insulated clamp
handles.
To avoid the risk of potentially fatal
injury, always avoid all contact with
electrical components while the engine is
running. Carefully adhere to the following
sequence, both to prevent damage to one
or both vehicles, and to guard against pos-
sible personal injuries.<
Preparing
1. Check whether the battery of the other
vehicle has a voltage of 12 Volts and
approximately the same capacitance in
Ah. This information can be found on
the battery
2. Switch off the engine of the support
vehicle
3. Switch off any consumer units in both
vehicles.
There must not be any contact
between the bodies of the two vehi-
cles, as otherwise there is a danger of short
circuits.<
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Connecting the jumper cables
To avoid personal injury from sparks,
always observe this sequence when
connecting jumper cables.<
On your BMW, the so-called starting-aid
terminal in the engine compartment serves
as the battery positive terminal, refer also
to Engine compartment overview on
page 178. The symbol + is embossed on
the cover.
1. Open the cover of the BMW starting-aid
terminal. To do so, pull the tab
2. Attach one end of the jumper cable
plus/+ to the positive terminal of the
battery or a starting-aid terminal of the
vehicle providing assistance
3. Attach the second end of the cable to
the positive terminal of the battery or to
a starting-aid terminal of the vehicle to
be started
Your BMW has a special nut as body
ground or negative pole.
4. Attach one end of the jumper cable
minus/– to the negative terminal of the
battery or to an engine or body ground
of the vehicle providing assistance