Thank you for the comments!
The choice of U, R and L were related to the action verbs (Unload, Refuel, Load), but you are correct in asking for a more ergonomic key binding!
And we're very sorry for the loud refuel sound! We'll test to get to a more confortable but yet noticeable volume!
And regarding the collection with the car, a "collecting" animation would be a nice touch! Maybe the player character could go out and collect the corpse... if we can pull it out and keep developing the game we'll try to add these features!