Reset airbag warning myself?

[nikasp]

Hi, I opened the driver's side door panel since I have a noise when driving on uneven roads or starting on high gears. I found out that is the white plastic piece on which the window rests that can move a bit.

Anyway, I loosened the minus on the battery while doing this. Did however once connect the power windows, and not the airbag, to be able to roll them down = now the airbag warning light is on...

Question:
Do I need to go into the shop to have this reset or can I do it via the OBC in the instruments or some other way? Everything with car's is uber expensive in Sweden and I know this is a 1 minute thing with the right tool...