Some people gut the lock, others depress the lock pin, then wedge something next to it so it can not extend. I believe when the lock is gutted the key in buzzer does not work any more either. I chose to replace mine with an aftermarket unit from fastlane. $70-something later I had it working great.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine