I had originally thought that my passenger side rear lock was out of synch with the rest, but it just isn't going up or down with the rest of the central locking system. I am familiar with all the common things that are likely to fail on the E38, but this has not been covered much.

I am assuming it has to be the motor? Anyone have any experience here? I was going to have the dealer look at it next week. Think I am looking closer to $100 or $500?