Serial number kitchen hood:

Remove the grease filter. You will find a label inside the hood with the type and serial number on it.
Or, remove the lamp glass, and there will be a label inside with the type and serial number on it.

Serial number Wine cabinet:

You will find the label at the bottom inside the cabinet on the left. Remove the bottom shelf.
If you cannot find the label here, the label is on the back of the cabinet.

Serial number Panorama:

You will find the serial number on the front of the cassette that the tower goes into. It is in the cabinet under the hob.

Serial number One and Easy:

You will find the label with the type designation and serial number on the underside of the hob. The label is glued to the metal.

Serial number refrigerator corner:

Corner cabinet or a straight wall cabinet with two doors?

Then you will find the year and month of manufacture on the inside of the cabinet, on the wall to the left of the door near the ceiling.

Cooling unit serial number:

You can find the serial number on a white label on the right side in the slot where the air comes out of the unit, just above where the dust filter is located. No disassembly is required to find it.