Help! Trunk locked with tools inside while installing trunk vacuum locking element

[ecoshadow]

I think this is what I did.....1982 300SD... had just replaced trunk vacuum locking element with the vacuum/pressure pump in trunk disconnected both electrically and pneumatically. Then closed trunk as normal assuming key lock was the only lock. Came back a few hours later and trunk would not open even when unlocked and external plunger pushed in. Can only figure that I left new element extended instead of retracted? And this is somehow keeping trunk lid closed, even with lock turned and pushed from outside? Any ideas how to open this thing? I certainly will appreciate some help. Thanks.