Yes, you're right laminated, 2 glass layers with a middle PVB layer for sound deadening. Although the LS has the same (front and back, instead of just front) and so does the merc S class according to the AAA. Last merc I saw with true double glazing (air gap) was in the late 90's (the tank aka W140), which is confirmed by the linked table, as it only had rear laminated windows, and we know it had the famous glass gapped side ones. Otherwise LSs and S class mercs all switched to side laminated with PVB some 20 years ago, at least according to AAA.