Forza Motorsport 5

Hey this is what you have to do get this achievement:
Go to free race
Game options:
Game type: Circuit Race
Max Ai Players: 1
Drivatar Difficulty: New racer
Laps: 1
Collision Mode: Default
Car Class: P
Drive type: Any

Then go to select car:
Rent the 2012 Audi #1 Audi Team Joest R18 e-tron Quattro

Then go to select track:
pick LE Mans FULL CIRCUIT

start game and come in first achievement unlock :)

Also these are the settings I used to unlock the achievement.

If you wish to obtain this during Career mode like I did then you need to do the following:

1) In the Racing Series, complete Prototype 1 Racing to unlock the 3 bonus races.

2) Race the (Full Circuit at Le Mans) making sure you finish at least 3rd to get a Gold.

3) Achievement will pop once the race is over.

Whichever car you use for the Prototype 1 Racing Championship should get you the achievement.

If you vote negative please state why so I can improve the guide....

Thanks.