BMW Z4 Roadster 2.5i 2004 - Manual (Page 97)

Reference
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Controls
Driving tips
Mobility
95
Connecting jumper cables
Always adhere to this sequence when
connecting jumper cables; failure to
observe this procedure can lead to sparks
at the battery terminals and pose an injury
hazard.
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The auxiliary jump-starting terminal located
in your BMW's engine compartment acts as
the positive battery terminal. Refer to the
engine compartment overview on page
82 .
The cover is marked with a +.
1. Open the cover of the BMW auxiliary
jump-starting terminal. Do so by pulling
the tab
2. With the + jumper cable, connect the
positive terminal of the drained battery
and the positive terminal of the support
battery.
To do this:
Connect one terminal clamp to the pos-
itive terminal of the battery or to an aux-
iliary jump-starting terminal of the sup-
port vehicle.
Connect the second terminal clamp to
the positive terminal of the battery or to
an auxiliary jump-starting terminal of
the vehicle to be jump-started.
Your BMW is equipped with a special
nut, refer also to the engine compart-
ment overview on page
82
3. With the – jumper cable, connect the
negative terminals of both vehicles.
To do this:
Attach one cable clamp to the negative
battery terminal or to a suitable ground
on the engine or body work of the sup-
port vehicle.
Attach the second cable clamp to the
negative battery terminal or to a suit-
able ground on the engine or body work
of the vehicle to be jump-started.
Starting the engine
1. Start the engine of the support vehicle
and let it run for several minutes at a
slightly elevated engine idle speed
2. Start the engine of the other vehicle as
usual.
If the first start attempt is not success-
ful, wait a few minutes before another
attempt in order to allow the discharged
battery to recharge.
3. Allow the engines to run for several
minutes
4. Then disconnect the jumper cables in
reverse sequence.
Depending on the cause of the fault, have
the battery checked and recharged by your
BMW center.
Never use spray starter fluids to start
the engine.
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