I think I've fixed the trunk lock on the 240D. I sprayed the lock cyl with lots of contact cleaner mucho gunk came out. Worked the key in and out then more cleaner and eventually the key works. I took the vacuum element out and found the unlock nipple broken off and the vac line plugged with a nail. The lock portion is fine and was working. Since I did not have a replacement vac element. I tried a McGyver repair on the broken one.

I used a 3/4 " length of steel brake line, cut a 1/8" length of external thread on one end, enlarged the hole left by the broken nipple on the vac elementwith a drill bit and a pin vise and self tapped the brake line into it, put a drop of crazy glue to give it a better seal. Installed it and the trunk lock now works like a charm. It remains to be seen how well the repaired nipple will seal.
[QUOTE=funola;1565829]On the 300D, there were lot's of gunk in the lock mechanism. The key turned but pushing in the button at different angles did not open the trunk. The vacuum

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked