Rather than just deriding someone, you could of course offer them a way to improve, by suggesting that it should be 'and solidly engineered', or 'engineered solidly'.

The whole sentence / tag line could probably do with improving, but maybe this is not a native speaker, making derision all the more unacceptable.

“Made in Germany”. Also, the grammar has been corrected by now.

My goodness, I advice you to read the implementation details of this and be humbled about your own aptitude for programming.