Advices:
(a): The Train A1 starts in Karlsruhe Main Staion, Train A4 ends in Karlsruhe Main Station. The coolest trains also stop in Ettlingen West.
Single ticket Karlsruhe - Ettlingen-Stadt bzw. Ettlingen-Stadt - Karlsruhe:
You can not use the KVV-Tickets on this train.
(b): Train Station Party Bad Herrenalb, special schedule (u.a. Shuttle Bad Herrenalb-Marxzell)
(N): Nikolaus-Steam Locomotive, reservation is necessary/tickets only in the advance sale, Special schedule. St. Nicolaus is in the train to give presents to the children.