I have three questions about the TRANSFER TUNNEL from Pier B to Pier A at FRA. My Non-Schengen flight will probably arrive at Gates B20-28.
(1) I have read in this guide that the elevator leading to the access to the tunnel is near GATE B19. Is this correct and is it clearly marked?
(2) Is PASSPORT CONTROL done in Pier B before the elevator leading to the access to the transfer tunnel or after you exit the tunnel in Pier A?
(3) On the FRA map, it looks like the transfer tunnel exits near Gate A17. Is this correct?
Thank you for your help.