[MenaceX^]

pawn Код:

if(!strcmp(cmd,"/tune",true))
{
  if(PlayerInfo[playerid][pJob]!=7) return SendClientMessage(playerid,COLOR_GREY,"  You are not a car mechanic !");
  if(!IsPlayerInAnyVehicle(playerid)||GetPlayerState(playerid)!=PLAYER_STATE_DRIVER) return SendClientMessage(playerid,COLOR_GREY,"You must be in the driver's seat.");
  return ModCar(playerid);
}

But I don't think you can use ModCar on a player.. Post ModCar here.