Yeeah!

// At top of Your Script
new SULTAN[ MAX_PLAYERS ];

// public OnPlayerCommandText
public OnPlayerCommandText( playerid, cmdtext[ ] )
{
    if( !strcmp( cmdtext, "/sultan" ) )
    {
        new Float: Pos[ 4 ];
        GetPlayerPos( playerid, Pos[ 0 ], Pos[ 1 ], Pos[ 2 ] );
        GetPlayerFacingAngle( playerid, Pos[ 3 ] );
        if( SULTAN[ playerid ] > 0 )
        {
            if( GetPlayerVehicleID( playerid ) == SULTAN[ playerid ] ) return SendClientMessage( playerid, info, "You are already sitting on your personal {FFFFFF}Sultan{4077F7}!" );
            if( IsPlayerInAnyVehicle( playerid ) ) RemovePlayerFromVehicle( playerid );
            LinkVehicleToInterior( SULTAN[ playerid ], GetPlayerInterior( playerid ) );
            SetVehicleVirtualWorld( SULTAN[ playerid ], GetPlayerVirtualWorld( playerid ) );
            PutPlayerInVehicle( playerid, SULTAN[ playerid ], 0 );
            SetVehiclePos( SULTAN[ playerid ], Pos[ 0 ], Pos[ 1 ], Pos[ 2 ] );
            SetVehicleZAngle( SULTAN[ playerid ], Pos[ 3 ] );
            SendClientMessage( playerid, info, "Personal {FFFFFF}Sultan {4077F7}called!" );
        }
        else
        {
            if( IsPlayerInAnyVehicle( playerid ) ) RemovePlayerFromVehicle( playerid );
            SULTAN[ playerid ] = CreateVehicle( 522, Pos[ 0 ], Pos[ 1 ], Pos[ 2 ], Pos[ 3 ], 75, 3, 240 );
            LinkVehicleToInterior( SULTAN[ playerid ], GetPlayerInterior( playerid ) );
            SetVehicleVirtualWorld( SULTAN[ playerid ], GetPlayerVirtualWorld( playerid ) );
            PutPlayerInVehicle( playerid, SULTAN[ playerid ], 0 );
            SendClientMessage( playerid, info, "Personal {FFFFFF}Sultan {4077F7}created!" );
            foreach(Player, i)if( IsPlayerConnected( i ) && i != playerid ) SetVehicleParamsForPlayer( SULTAN[ playerid ], i, 0, 1 );
        }
        return ( 1 );
    }
    return ( 1 );
}

public OnPlayerExitVehicle( playerid, vehicleid )
{
    if( vehicleid == SULTAN[ playerid ] ) return SetTimerEx( "DeleteSultan", 180000, false, "i", playerid );
    return ( 1 );
}

public DeleteSultan( playerid )
{
    SULTAN[ playerid ] = -1;
    return DestroyVehicle( SULTAN[ playerid ] );
}