Porsche Cayenne 2005 Owner's Manual page 321

Removing battery
1. Withdraw the ignition key.
Remove the Porsche Entry & Drive control unit
from the ignition lock in vehicles that contain
this feature.
Please observe the chapter "REMOVING THE
CONTROL UNIT FROM THE IGNITION LOCK" on
Page 58.
2. Undo the 4 fastening nuts of the battery box.
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3. Open the 4 clamps of the battery-box cover.
4. Remove the battery-box cover.
Danger!
Danger of explosion and injury and risk of
short circuit and damage to the alternator
and electronic control units.
f Disconnect the negative cable first, and then
the positive cable.
5. Disconnect the negative cable.
6. Disconnect the positive cable.
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7. Pull off vent hose G on the battery.
8. Undo fastening nut H of battery fastening
plate.
9. Remove battery fastening plate.
10.Lift battery out of the battery box using the
folding handles.
Practical Tips, Minor Repairs
321