I have to agree with you that there must still be a code in the PSE that is inhibiting the line to the trunk mechanism.

If I manually apply pressure to the mechanism it will pull the latch to the fully closed position (off the car).

Likewise, pressure to the tube that feeds the release solenoid will un-latch it.

The problem can't be in the trunk lid unless a micro-switch is messing up.

Since these things (W220) are so code-sensitive I think the only thing I can do is put everything back together and let my shop re-read the codes and figure it out for me on Monday.

They dropped what they were doing this morning to read and reset the codes for me, but it seems we need to revisit that...

In my testing, I put a little too much pressure to the release diaphragm and cracked a few of the retainer tabs...

The part is 220-800-02-75 and it is only available from MB as the entire trunk latch assembly for $$$$. It is still holding together, and I will probably reinforce it with some epoxy, but I wonder if anybody happens to have one of these laying around in a latch assembly they have pulled off another car?

This W220 has been a pain. Multiple A/C problems, intermittent starter problems, rattling catalytic converter, and now this...


Thanks!

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