Almost every safety feature in the car has been either upgraded or reinforced. Armour plating which adds significant weight to the vehicle is able to withstand bullets fired even at close range. We wouldn’t be the least bit surprised to see a fleet of these cars over at 50 Cent's place.
BMW has its own section dedicated to producing armoured cars, called International Direct Sales. Here, they can sell you a 5-series, X5, or 7-series with bullet and bomb proofing, and even provide advanced driver training for evading attackers.
Click here to see a shot of the interior.