I have a bmw 318i se that the battery has gone dead on now i can not open the doors of the car the boot does open but can not get into the car due to no middle arm rest how do i get to the battery to recharge it so i can open my car doors?

I think you should go for repair manual first for your vehicle after that it will be easy for you to solve the problem. Check the link may be you will get something useful here
2002 BMW 318i Workshop Service Repair Manual

I don't know that this will work, but try using the key and opening the door at the same time, both sides, this procedure works for locked doors and a dead battery, hope this helps, let me know.

in the boot on r/hand side.

open trunk, disconnect rear trunk light. use jump box and connect wires to pos neg on jump box. this will give u enough juice to open doors, I have done it twice. easy to do

HI " open your trunk and at the same side your gas door is you will see a cable whit a handle pull soft on that it should open the gas door

try locking and unlocking the car with the key 3 times slowly ,other than that i have no idea ?? another trick is to disconnect battery and join the cables together for a few minutes to discharge any capacitors that may be holding a charge in the computer..Only other thing i can think of is the main dealers who have the right connectors and software to re set it all .sorry i havent been of any help

something in the airbag system is at fault. it could be the airbag(s) itself or any of the sensors that detect a crash to deploy the airbag. i would really take it into BMW and have it checked & repaired. the airbag(s) will not deploy with this light on so your safety is at risk if you are ever in an accident..

open doors ,, remove batt cable for 2-3 mins (with doors open) Hook batt cable back up unlock doors with switch (while still open ..shut doors try key first lock then unlock !!
Should do it !!!

this problem is most commonly caused by the rotating contact under the steering wheel (also called the clock-spring contact), it has developed and open circuit, the airbag control/diagnostic monitor senses this and disables the airbag system

Get a new lock as the dead lock has broken. But befor you have it installed have the key tumblers for the dead lock