A system for monitoring brake pad wear of a brake, including an apparatus for monitoring brake pad wear of a first type (total wear monitoring) and an apparatus for monitoring brake pad wear of a second type (final-position wear monitoring). The apparatus of the first type and the apparatus of the second type are connected by way of a connection element. The connection element is created for expanding the functionality of a device for brake pad wear monitoring of a brake, and is designed to establish a connection expanding the functionality of the device between an apparatus extending the functionality and a device whose functionality is to be expanded.