A sentimental miniature common to late 19th-century amateur piano repertoires. It relies on a balanced ABA structure and a recurring, easily remembered melodic motive.
The challenge lies in shaping the melody expressively over the repetitive accompaniment pattern.
Comparable difficulty and character — good candidates for what to learn next.
Auf Wiedersehen is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Auf Wiedersehen lasts about 3 minutes.
Auf Wiedersehen is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include "Liebessuche" by Karl Jürgens, Believe Me, If All those Endearing Young Charms by Irish Folk Music, Valse sentimentale, No. 6 by Pyotr Tchaikovsky — see the full similar-pieces list on this page.