Recent research challenges established models of speech production by revealing unexpected phonetic differences in phonologically identical elements induced by morphological structure. While established models assume that morphology does not play a role in later production stages (Kiparsky, 1982; Roelofs & Ferreira, 2019), it has been shown that English word-final /s/ duration is longest in non-morphemic contexts, shorter with suffixes, and shortest in clitics (Plag et al., 2017; Schmitz et al., 2021). Subsequent research found that such differences are not only produced but also perceived by listeners and able to influence comprehension (Schmitz, 2022). Recently, Baer-Henney & Schmitz (2023) investigated if German speakers could use subphonemic durational cues to acquire the morphological categories singular (short word-final /f/) and plural (long word-final /f/) in an artificial language. However, the study revealed subphonemic cues were insufficient. Building on English findings, the present production study examines subphonemic durational differences in German word-final /s/. Preliminary results (20 speakers, 800 data points) show significant differences between non-morphemic and plural /s/ duration (p<0.001; Cohen’s d=0.3). The findings challenge established models, suggest that Baer-Henney & Schmitz’s (2023) null-results were due to the reversed direction of durational cues used, and indicate morphological influences on speech production extend beyond English.