When I recently purchased my '88 300E it had only one key. I promptly ordered another key through a local MB dealer for $30. The key will lock and unlock everything...doors, glovebox, and trunk. However, if you lock the car door and then go unlock and open the trunk, the alarm will sound. If, on the other hand you try to lock the car by locking the trunk first...the trunk will lock but the doors will not. Any ideas?

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Tony

1988 300E Metallic Blue Black/light Gray interior

MBCA Member