What armour does the Audi A8 L Security use

The Audi A8 L Security conforms tothe highest level of criteria [for protection] that applies to civilian vehicles. This means it uses class 7 bullet resistant armour tested againstNATO subcaliber ammunition. That sounds serious, and more than a match for the Merc. Even though their protection levels have been measured on different scales, theyre equally tough.
Theres even an intercom system to passengers can communicate with the outside world, putting off any wouldbe assailants.