Grand Theft Auto 4 Easter Egg - Ultra Super Secret Car in Grand Theft Auto Iv

Go to the old abandoned mansion in westdyke, where you take the truck of drugs in the mission 'Truck Hustle', for Phil Bell.
Look Behind the Garage (where the cars full of drugs are in in the mission 'To Live and Die in Alderney,' also for Phil Bell.

Taken a snoop? Ok! You see that car? It's hidden amongst the bushes, and it's called the 'Sultan RS.' (Not to be confused with the car 'Sultan R' Which is a lot less less rare.

The Sultan RS Is one of the rarest cars in the game, only to be found behind this garage.