W140 can be had with bulletproof equipments from factory, but as W140 has double-paned side windows, many may mistake it for bulletproof glass.
One funny story is that I was going home at night(around 11:30 PM), and encountered a road-block(drinking & driving counter-attack). I rolled my window 2/3 down and the officer was starring at the window while asking if I have had drinks that night. He then ask me to roll the window all the way down and up againt, and said "That's hella thick of a glass for side windows", so I replied, "Yes Sir, it's double-paned glass, German engineering!!
" And drove away with his mouth wide opened!!! You should see his face when he realize that the side window glass is REALLY that thick and not some young punk modified to smuggle drugs inside of door panel.
Andy Kuo