Recently it has been shown that large pre-trained language models like BERT (Devlin et al., 2018) are able to store commonsense factual knowledge captured in its pre-training corpus (Petroni et al., 2019). In our work we further evaluate this ability with respect to an application from industry creating a set of probes specifically designed to reveal technical quality issues captured as described incidents out of unstructured customer feedback in the automotive industry. After probing the out-ofthe-box versions of the pre-trained models with fill-in-the-mask tasks we dynamically provide it with more knowledge via continual pre-training on the Office of Defects Investigation (ODI) Complaints data set. In our experiments the models exhibit performance regarding queries on domain-specific topics compared to when queried on factual knowledge itself, as Petroni et al. ( 2019) have done. For most of the evaluated architectures the correct token is predicted with a P recision@1 (P @1) of above 60%, while for P @5 and P @10 even values of well above 80% and up to 90% respectively are reached. These results show the potential of using language models as a knowledge base for structured analysis of customer feedback.