A professional is required to replace a Mercedes key if it is stolen, lost, damaged, or destroyed. Not only does a replacement key mean a new functional, expensive, and costly key, but an experienced professional will have the knowledge required to safely and efficiently replace a Mercedes key. In this article, we'll look at the different ... in the case of a Mercedes. While a spare one can be beneficial for security purposes however, it will not be of much use when you lose the original....