Arnold N - Model train locomotive (1) - BR103 & BR221 - DB

Interesting set consisting of two locomotives from Arnold in used condition.
The BR103 runs, but is loud and sometimes stutters. A revision and some oil are urgently recommended to prevent damage to the locomotive.
The BR221 has no function.
Furthermore, on the BR103 one side is missing the glass for the lighting, which means one side is not properly lit (see pictures). The housing of the BR103 sits a bit loose. Both locomotives have various smaller cosmetic flaws. Due to the aforementioned defects or the necessary revision, the set is sold as defective.
Please judge the quality for yourself from the numerous pictures.