I need to access the trunk but the battery is dead and the manual trunk pop does not work nor does the key. How can I get the trunk open to change the battery?

Sometimes you can hook battery charger up to starter battery terminal and charge it that way.
Sometimes you can remove rear seat to access the trunk, there might be an emergency release handle to pop the trunk.
I'd have to look at it, I can't be positive.

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.

first get new battery,then see what happens?

use your ignition key to open the trunk, the key hole is hidden just under the opening button and to the right side

you can charge the battery from the engine compartment. check your owners manual that is the correct place to jump and to charge the battery.

I have the same issue (battery is completely dead in my 1998 Mercedes C280 and I can't pop open the trunk). I looked under the hood and have no idea where the positive charging post would be - can anyone help me find it? Thanks

I simply opened the bonnet. Connected the battery charge positive to the + feed on the back of the alternator, connected the negative to the body. Turned it on, immediately the interior light comes on. Turn on the ignition press the cabin boot switch and it opens the boot. Charge battery as normal. Easy Peezy

cover under bonnet with a big P on it and negative is anything metal on the engine

Hey John,

This is very common, because your battery is dead your remote isnt going to work. So what you have to do is look by the license plate light bulbs, their is a key hole wear you can insert you key and open the trunk to charge/ or jump start your battery

the battery has gone dead you can not open the boot/trunk with the electrical system but you should be able to get to the battery by using the key in the lock on the outside of the the trunk its either in the xj badge or the number plate illumination holder. if you can open the engine compartment there is battery pos power points so you can jumpstart/power up the car