I visited a friend of mine, who works for McCarthy Motors and he showed me two 'armour' S-Classes. One was a W140, which I didn't look at closely, but the other was a W220 S600 Armour, which I looked at closely. Both belong to the Government and the W220 was getting a windscreen replaced at a cost of ZAR200 000. The side windows must easily be 3-4cm thick and opening the doors takes quite some effort. The front outer layer of the windscreen had cracked, but the windscreen was probably also about 4cm thick. I believe that an amour W140 weighs in at about 4 tons and only has a max speed of 160 or so.