Due to a series of unfortunate events, my 87 300D is now without an ignition key. Because the unit was replaced at some point before I purchased the car, the ignition and door keys didn't match so I can't just go to the dealer for a new key. Does anyone have info on removing the cylinder without a key? I found a writeup for the W123 cars, but it doesn't look like that applies. Any help would be GREATLY appreciated.

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1987 Mercedes 300D