I recently purchased and 2007 LS 460L and notice that when I put the vehichle in drive instead of "D" for drive I see "S-D" on the instrument panel. Is this correct or have I inadvertenly turned on another driving mode....usually only see "D" or am I mistaken

 

Sounds like you toggled the Sport mode

 

That's normal. It's always showed that you probably just never noticed.