Locked my keys in the trunk. The trunk release botton wont work. How do I get my truck open?

If it has the electric trunk release, the button could be in the glove box.
Otherwise you may have to remove the back seat to gain entry to the trunk.

I would check the owners manual or with Cadillac - its possible the remotes lost part of the signal and need to be reset. It sounds like the receiver is not getting a signal from them by using that button.
Could be the receiver too.

you have to stick the key in the trunk and turn it to the lefy while hittin the unlock button on the key pad 35 times has to be 35 and it will unlock. my battery died and it locked the trunk as u know i coudn't jump it cause the battary is in the trunk haha but yeah 35 times while hitting the key. mercedes wont tell u but my buddy works for inskip and filled me in your o so welcome from one s430 owner to another

it sounds like the lock motor is working but the latch mechanism is seized and needs repair.it could be the arm that attaches the motor to the latch could have come unhooked and not releasing the latch.i`m not too familiar with these but i can`t see a manufacture building a car and not having an outside access to the trunk like a key lock as it becomes a safety issue.if you mean the key lock is missing you can insert a screw driver into the hole and engage it into the latch mechanism and turn this should open the trunk.if not then you will have to remove the rear seat and hope there is enough room to crawl into the trunk to manually open it.

the trunk release button has a little metal like a hammer that hits the trunk lock to release if bent will not open or if you disable it by pushing it down to disable trunk release button the key lock is frozen will not work even if key go's in normal. need to replace it. if u need to get in your trunk and if it is empty would be easy to do just open the middle part of the back seat panel and with a thin and sturdy stick and flash light can hit the little hammer to open it . hope it helps

Isn't there botton somewere on the door or left lower conner of dashboard to open trank remotely?

By switching the lever you locked the inside trunk release, you will need to put lever back. as far as the trunk you may need to remove the rear seat, pop lower part out and then remove the bolts to the top half of the seat then try to reach the lever so it will open from the inside. i've found that many of these cars with the pop lever inside have sticking trunk locks from not being used, what you do first is spary lock good,with wd40 or pb blaster then slide key in and out and try to turn this may take a whhile but it works then tumbler will free up, you just have to keep spraying inside lock and working the key.

key works remote doesnot work

Has the key been giving you trouble opening the trunk before, or was this something that suddenly stopped working? Same question concerning the trunk release. If this has been going on for a while (getting worse gradually), try spraying something like wd-40 in the lock, then try the key. The trunk release cable stretches out w/ age and will stop working. If you can get vice grips to grab firmly on the cable, not the release knob, you can pull it out farther than just pulling the knob/lever, it should open. If this doesn't work you can remove the back seat, look to see if something was closed in the latch (a shirt, coat, etc, that might jam the latch)countrycurt0