1999 porsche 911 how to open hood with dead battery

The cheapest way to get around this and get enough voltage into the system to open the hood is to purchase a cigarette lighter extension (about 3 feet) and cut off the female plug on the end. Strip the 2 wires back a few inches and attach one to the positive and the other to the negative on a set of jumper cables. Attach the other end of the negative jumper to a battery. With the keyless entry in hand, touch the positive cable to the positive terminal on the battery and press the unlock button until you hear the car doors click. Once it clicks, you should be able to use the hood latch to gain access to the battery.

Hi, you may try using a cigarette lighter battery charger to energize the system so the hood release will work (electric). Happened to me too and just had it towed to the Porsche dealer. The mechanics have a work around (they didnt want to show me) but didnt charge me for the work so it was all good. Hope this helps.