Start the “Secretly Learning To Drive” quest by talking to [Ferrell Guild Merchant] Mildun in City of Junon Polis. You must be level 50 to do this.
He will ask you to speak to his fellow Minister [Akram Minister] Mairard in Adventurer's Plains.
Mairard will ask you a question.
“Who invented the Mana Engine?”
1. Johanson Planner.
2. Anthony Flight.
3. Orgin Flouiro.
“When you combine each part of a Cart, which part must you start with?”
1. Cart Body
2. Cart Engine
3. Cart Wheels
After you gained all 3 documents go back to Mildun in Junon Polis.
He will ask you to hide the evidence in the Goblin Cave (B1) and kill the Coal Mine Goblin Worker. This can take some time.
Return without the certificates to [Ferrell Guild Merchant] Mildun in City of Junon Polis.
There you go, you’ve just earned the Drive Skill.