Receiving a defective glass door - Report the defect?

I am not sure whether the OP had to check upon pickup

He does not have to.

Volker knows better how to answer that

;)

For commercial customers, however, the risk passes already when the goods leave the seller.

Absolutely right, because normally these are not consumer goods purchases within the meaning of the regulation (unless the entrepreneur buys for private use and that is also recognizable). ;)

There are no real disputed points here, only sellers' claims that the legal situation would be different (but it is not). The law simply cannot regulate every life situation and certainly cannot show when goods actually have a defect.

Here it is quite simple. The law states that the seller has to prove freedom from defects within six months after the transfer of risk. That would also have been quite simple: a) open the box, b) look at the panes, c) if the panes are OK, have the customer sign that the goods are okay, and d) reseal the box.

If he omits this (which he is allowed to), then he risks the goods coming back to him that the customer actually (possibly accidentally) damaged.

Unfair? No, just normal entrepreneurial risk. ;)

The seller will surely know that as well. That’s why the "generous" offer of €50, with which the OP is supposed to be fobbed off. And the additional issue mentioned by the OP might possibly lead to a follow-up order for the craftsman. From an entrepreneurial point of view, of course clever; from the perspective of the insurance community, of course fraud.

The insurance companies are not stupid either and may ask how that is supposed to have happened...

As of now:

I called the dealer & he informed me that I will get a new glass door for €73 (in addition to the requested €600). More precisely, he contacted the manufacturer and agreed that the three parties involved will share the incurred costs (manufacturer, dealer, consumer i.e. me). My costs amount to €73 in this case, and I can keep the already delivered damaged door and additionally receive the new one. I asked him for 2 days to think it over.

What do you think about that?

What do you want to do with a damaged door? I would insist on the replacement and delivery of flawless goods.

What do you want to do with a damaged door? I would insist on the replacement and delivery of flawless goods.

And of course without any additional costs. You should have realized that the retailer is responsible after Volker's posts.