[Chrisis]

on the top of the script :

pawn Код:

new derby[MAX_PLAYERS]

in the code you send him to derby :

pawn Код:

derby[playerid] = 1

in the code he press 2 to repair (propobly on player key state change )

pawn Код:

if(derby[playerid] == 1)
{
         SendClientMessage(playerid,COLOR_RED,"You are in derby , you cannot repair your car !");
}

on the code of your auto repair system : ( i suggest on player update )

pawn Код:

public OnPlayerUpdate
{
         if(IsPlayerInAnyVehicle(playerid)
         {
                  if(derby[playerid] != 1)
                  {
                           RepairVehicle(GetPlayerVehicleID(playerid));
                  }
         }
}