Deathadder elite mmb tilt function?

Hi everyone,
i recently purchased a DAE and noticed that i was able to activate the mmb by pushing it right.

The Mamba elite comes with this lateral function but the mmb keys function as 3 separate inputs while both of mine register as just mouse button 3 or mmb.

Is this a intended feature or did a faulty scroll wheel accidentally come with a cool mechanism?
thanks in advance!