Castiel's Pimpmobile
From Super-wiki
Castiel steals a Lincoln Continental (licence plate IA B2676), in order to reach the Bunker in 9.10 Road Trip, although it runs out of gas before he gets there. Dean, Cas and Crowley later use the car as Gadreel has stolen the Impala.
When Crowley comments "What are you, a pimp?" to Castiel, he responds with "I like it," as his reasoning for choosing the car. The car has been modified to be a lowrider, as was seen as it drove away with the hydraulics bouncing to a hip-hop song. It is last seen parked outside Waldorf Financial, a secret NSA listening post.