Examination and notification of defects. (1) We shall not be liable for defects of which the Buyer is aware at the time of conclusion of the contract or is not aware due to gross neg- ligence (§ 442 BGB). The Buyer is obliged to inspect the goods im- mediately for defects (including wrong and short delivery) in accord- ance with the statutory provisions (§§ 377, 381 HGB) and, insofar as this is feasible in the ordinary course of business, also to investi- gate any suspicion of defects with reasonable effort. In any case, an inspection shall be carried out again immediately before further pro- cessing, e.g., by mixing.