Thanks! Knowing that what I might be searching for would be somewhere under the dashboard is a good first step.

Then I am not an engineer nor have any experience in electronics BUT I know from my dad that taking the dashboard apart is not an easy task. If I would succeed I do not know what I would be looking for… Would tan antenna look like a piece of wire? Or could it be embedded in the 'copper' circuitry of a PCB? Do cars use regular SIM cards like the ones found in phones or would they look different?

The maintenance manual would probably be a good place to start before trying to put anything apart.

Hurrah!
Let's see if this will be the update that will break everything and force me into a reinstall of LMDE… I wish I knew more about Linux, m re-installation rate is far too hi.

Time for an update! I hope it will be released with XFCE soon too.