Until recently, transit in Frankfurt requires security check – which has since been dispensed with, though you still get an escort from the door to the lounge. Instead of weaving through the airport, one disembark straight to the waiting gate and straight to the lounge. In the past, you will come to the Maple Leaf Lounge first but with this new arrangement you reach the Senator Lounge first.
Senator Lounge is used as the First Class Lounge for Star Alliance First Class and Star Alliance Gold passengers. Unfortunately, there is no admission to the Lufthansa First Class Lounge or First Class Terminal (for those departing from Frankfurt).