[Vanter]

pawn Код:

new vehicleid = GetPlayerVehicleID(playerid);
if(GetVehicleModel(vehicleid) == 498)
    {

Add this to your command
and maybe,

pawn Код:

if(GetVehicleModel(vehicleid) != 498)
{
     SendClientMessage(playerid, COLOR_RED, "You must be in the correct vehicle in order to do this job.");
     return 1;
}