How do I open it?? The key wont open the door or trunk manually either :/

is your hood popped? if it is there is a post you can attach a charger to

It took me about an hour of wiggling the key in the trunk on mine to get it to work. Keep at it and it'll finally go. Gotta get it to turn and then push in.

But don't snap it off!

Get plenty of WD40 in the lock slot to free up the rust...

Thanks guys, Ill try it and report back

trunk lock is a fokker if you haven't used the switchblade for many years, gunk n crap will get this lock screwed up.

Try and get the hood open and you can plug electricity to the electric pole under a plastic cover front of the fuse box. It will open the back end

Me thinks I'm screwed.

Are you sure you can't get the engine hood open? That will be the safest way to plug some juice into the circuit (see my post further up). Otherwise, can't you get a "specialist" to open a door with a thin blade of wire to the door latch?

this an old post... I can get my hood open, but not my trunk. Where's is this circuit located at?

oh, just saw u post, going and look now...

Good, keep us posted!! I'm going out for diner, but if you need a photo of where the electric post is, I can shoot you something when I get back in around 2h from now...

k..i c it, so do I attach the positive end of my cables, and ground the other end?

Yes, positive (red) cable on the post (be careful not to touch anywhere else...) and a ground somewhere on the chassis. That will get some juice in the circuit and enable you to pop the trunk switch.

Nothing happening...maybe I'll leave it for a bit. If it still fails, I'll try and trickle charge it.

Thank you sir! Now I can jump start the C, and bring it into the garage. C was probably pissed that it's been outside for a week.

Leave the trunk open.... just in case

How do you open the HOOD when you lose power ?? If trunk doesnot open , you canot get inside the car !!! . Is there a mechanical way to open the Hood ? Thanks .

For my car, you can open the driver side door using the key... there's a cover that covered up the key hold at the usual place.

That's the correct way if you have the key handy....

That remind me another story

I have a BMW E34 which the door lock is powered by battery and the battery/hood switch is located inside the cabin... the only "door" you can unlock with you key is the trunk, what can you do?

Different car, similar problem, but needs a different solution

DRBC43AMG , Thank you .

Yes, this is the way my question should have been stated , how to open the hood if power key is not openning the door ? Does the manual key open the door or does it open the trunk only ?

The key will open the door for sure! I tried once. It failed to open the trunk...maybe it wasnt opened by key for over 10yrs.

Here are my suggestions
1) You can buy a cigrette plug charge that should give enough power to open the trunk
2) For my E34, there is no way I can open the door and therefore I bought a 12V battery, two tiny wire and use the rear light blub socket to provide little battery just to operate the electric door lock

I guess W202 is a lot easier as you can open the door with your key, hence open the hood and you are good to go