I have a 2004 xlr the battery is dead and can not open up the car. I bought the car used and was not given any key if there is one. How can I get power the car to open the door?

To open the hood of a 2004 Chrysler Pacifica with a dead battery, try these steps:
Find hood release lever: Usually located on left side of driver's footwell near the hood release cable.
Jump-start battery: Connect battery to another car's battery if it's completely dead. This will provide enough power to release the hood latch.
Use manual release: If jump-starting is not possible, consult owner's manual for manual release location.
Get help: If unsuccessful, call for help from a tow truck or mechanic.
Caution: Make sure the car is in park, emergency brake is engaged and engine is off before opening the hood.

Hook up a jumper battery under the hood. Check your owners manual.

Most cars with dead battery you can turn key, then lift handle then turn key more to manually unlock (driver's door).

Get into your car the same way you would if you locked your keys in the car. Call AAA or try a coat hanger.

Read my other post to your other question

If the doors are open,drop the back right seat back,
& crawl into trunk & pull the yellow release tab

OBD2 Vehicles do not use the lighter for battery voltage,
that was obd 1 systems ,the power is in the diagnostic connecter
by your right knee,need adapter to use battery KAM memory
back -up

The seat may only be released from the trunk--.have to check my 2004 LS

I would have the dealer cut a new key to get the driver's door open - or use a spare. You can buy a small charger that plugs into the cig lighter.

use a wedge in door top grab handle with wire open, then remove rear seats .

does your fob key still operate the door locks? if not do you believe the battery may be dead? or have you already replaced the battery for it? Some parts stores have a rf indicator on their battery displays. This checks for radio frequencies which are used by those keys to determine if the batteries or dead rather than a faulty code programmed. Some vehicles have theft deterent keys which are magnetic or have a unique tumbler pattern which can't be copied easily. On the other hand dummy keys are given if requested/purchased and they can only unlock doors. It sounds like you have a dummy and should check your fob asap

Get proof of ownership, title, insurance info, regerstration card and ID. Go to a dealer to get one. There should be a key hole that's hidden on the lower left corner of the rear bumper (I haven't actually looked for it). This will open the trunk, from there you can pull a release cable to open the door. I haven't actually tried it

There is an emergency key for just this situation.

Use it to pry the keyhole cover off the left (driver's) side of the rear bumper. The pry point is at the bottom of the cover. Insert the key, unlock the trunk and lift it open, it's not too heavy.

Open the little door on the left side of the trunk, near the back. It has a gas pump on it. There are 2 tabs inside. One opens the gas cap. The other unlocks the drivers door. Now you can get into the driver's side of the cabin.

Below and forward of the button to release the hood on the left side of the steering wheel, is a manual hood release. Pull it and release the hood.

Now you should be able to open the hood and charge the battery to make everything work again.