Where can I find the serial number of my DTBD RooftopTent?

For our warranty registration we ask for the serial number of the roof tent and sometimes the dealer can also ask for it. The serial number of our DTBD outdoor roof tents is quite easy to find, if you know where to look of course. 

So before you start turning the whole roof tent upside down, we have the answer for you here:

On the inside of the hinge under the mattress is the serial number. To get to it easily it's best to keep the tent closed, remove the cover and then to the left or right it's in the aluminum profile