Thanks. What I meant to say was, "I won't be able to unlock anything using the key manually." Your answer tells me I can. But my original query didn't include 2 youtube videos I came across. The first at refers to the problem in an E32 and E34, and it offers a solution. I thought it might be the same with my E46. The second video at is for an E46 and offers no resolution.
All that got me to thinking.