772ed185_Grand_Theft_Wiki__the_GTA_wiki__Description
[Ability] Damage-proof [Code] DP [Description] 
Damage-proofing is one of the best abilities that a car can have, but is extremely rare. The car can't recieve any exterior damage, which means the player can crash the car many times without being destroyed. This also applies to melee weapons which won't destroy the car either.
Special Vehicles - Grand Theft Wiki, the GTA wiki