Changing dead battery!!
1. Kick out the panel behind the backseat armrest
2. Get a locksmith
3. Keep working the lock with spray lubricant
Anything else that does not require $$$ to get in the trunk?
Have patience and it should work. Try your other keys if you have them.
I kept at it for about 30 minutes and with judicious amounts of WD-40, it finally turned and unlocked. I put the new battery in and it started right up.
Thanks for the advice and I can't begin to describe how helpful this forum has been to me since I've owned my CLK!!!!!!



