Jus tin case there any other W126 or similar model car owners who hav ethis problem. I discovered this on accident the other night as I was trying to get my keys out of the trunk. Uscrew the 2 screws that are holding the first aid kit lid and storage lid in place. After you d this, the whole rear deck should be able to come up. Once you do this, take out the two plastic trays that are in the first aid kit and storage space and reassemble. You're SQ and SPL will improve dramatically. Thi sshould also work with other models who have similar rear decks.

__________________
W126 1983 300SD 286,000 miles and ticking
Baby blue exterior Grey MB tex
Recent work:
Replaced air cleaner mounting brackets and heat shields
Replaced alternator, fan and power steering belts
Replaced positive battery terminal
Replaced negative battery terminal and cord
New Duralast Battery

My car needs work.